Become a Geometry Master

About Course

Unlock the Secrets of Geometry – **Free** Online Course!

This comprehensive geometry course, available for free on Theetay, is your key to mastering this fundamental branch of mathematics. Learn from experienced instructors and gain a deep understanding of geometric concepts, from basic lines and angles to complex 3D shapes.

This course, originally offered on Udemy, is packed with over 232 lessons, 60 quizzes with solutions, and 12 workbooks for extra practice. You’ll cover key topics including:

Lines and angles, including interior angles of polygons
Quadrilaterals, like rectangles, squares, and parallelograms
Circles, including arcs, inscribed angles, and chords
Area and perimeter for two-dimensional figures
Volume and surface area for three-dimensional figures
Triangles, including interior angles, bisectors, and circumscribed and inscribed circles
Pythagorean theorem and pythagorean inequalities
Triangle congruence, including SSS, ASA, SAS, AAS, HL, CPCTC, and isosceles triangle theorem
Triangle similarity, including 45-45-90 and 30-60-90 triangles, plus triangle similarity theorem and midsegments
Transformations, including translating, rotating, and reflecting figures
Logic in geometry

Each section features engaging video lessons, comprehensive notes, challenging quizzes, and extra practice workbooks to solidify your understanding. This course is perfect for students, professionals, or anyone looking to refresh their knowledge of geometry.

Start your journey to becoming a Geometry Master today. Enroll for free on Theetay!

This course is offered for free on Theetay and originally comes from platforms like Udemy, Udacity, Coursera, MasterClass, NearPeer, and others.

Quadrilaterals, triangles, and circles, including calculations of angles, perimeter, and area
Three-dimensional geometry, including prisms, pyramids, cylinders, cones, and spheres
Transformations of figures, including translating, rotating, and reflecting
Logic and proofs, including conditionals and converses
Parallels and polygons, including interior and exterior angles
Triangle congruence, including SSS, ASA, SAS, AAS, HL, and CPCTC, plus the Pythagorean Theorem
Shapes in space, including distance between points in space
Dilations and scale factors, including triangle similarity statements

Course Content

01. Getting started

A Message from the Professor
001. Hi! START HERE Course overview.mp4

00:00
002. Download the Geometry formula sheet.html

00:00

02. Lines

001. Introduction to lines.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Naming simple geometric figures.html

00:00
004. Naming simple geometric figures.mp4

00:00
005. Naming simple geometric figures.html

00:00
006. Length of a line segment.html

00:00
007. Length of a line segment.mp4

00:00
008. Length of a line segment.html

00:00
009. Line segments, slope and midpoint.html

00:00
010. Line segments, slope and midpoint.mp4

00:00
011. Line segments, slope and midpoint.html

00:00
012. Lines, parallel, perpendicular, or neither.html

00:00
013. Lines, parallel, perpendicular, or neither.mp4

00:00
014. Lines, parallel, perpendicular, or neither.html

00:00
015. Distance between two points in two dimensions.mp4

00:00
016. Distance between two points in three dimensions.html

00:00
017. Distance between two points in three dimensions.mp4

00:00
018. Distance between two points in three dimensions.html

00:00
019. Midpoint of a line segment in three dimensions.html

00:00
020. Midpoint of a line segment in three dimensions.mp4

00:00
021. Midpoint of a line segment in three dimensions.html

00:00
022. BONUS! Extra practice problems. ).html

00:00
Section Quiz

03. Angles

001. Introduction to angles.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Measures of angles.html

00:00
004. Measures of angles.mp4

00:00
005. Measures of angles with algebra.mp4

00:00
006. Measures of angles.html

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007. Adjacent and nonadjacent angles.html

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008. Adjacent and nonadjacent angles.mp4

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009. Adjacent and nonadjacent angles.html

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010. Angles of transversals.html

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011. Angles of transversals.mp4

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012. Angles of transversals.html

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013. Interior angles of polygons.html

00:00
014. Interior angles of polygons.mp4

00:00
015. Interior angles of polygons.html

00:00
016. Exterior angles of polygons.html

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017. Exterior angles of polygons.mp4

00:00
018. Exterior angles of polygons.html

00:00
019. BONUS! Extra practice problems. ).html

00:00
Section Quiz

04. Quadrilaterals

001. Introduction to quadrilaterals.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Measures of quadrilaterals.html

00:00
004. Measures of quadrilaterals.mp4

00:00
005. Measures of quadrilaterals.html

00:00
006. Measures of parallelograms.html

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007. Measures of parallelograms.mp4

00:00
008. Measures of parallelograms.html

00:00
009. BONUS! Extra practice problems. ).html

00:00
Section Quiz

05. Circles

001. Introduction to circles.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Equation of a circle.html

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004. Equation of a circle.mp4

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005. Equation of a circle.html

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006. Degree measure of an arc.html

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007. Degree measure of an arc.mp4

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008. Degree measure of an arc.html

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009. Arc length.html

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010. Arc length.mp4

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011. Arc length.html

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012. Inscribed angles of circles.html

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013. Inscribed angles of circles.mp4

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014. Inscribed angles of circles.html

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015. Vertex on, inside, and outside the circle.html

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016. Vertex on, inside, and outside the circle.mp4

00:00
017. Vertex on, inside, and outside the circle.html

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018. Tangent lines of circles.html

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019. Tangent lines of circles.mp4

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020. Tangent lines of circles.html

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021. Intersecting tangents and secants.html

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022. Intersecting tangents and secants.mp4

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023. Intersecting tangents and secants.html

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024. Intersecting chords.html

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025. Intersecting chords.mp4

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026. Intersecting chords.html

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027. BONUS! Extra practice problems. ).html

00:00
Section Quiz

06. Area and perimeter

001. Introduction to area and perimeter.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Area of a rectangle.html

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004. Area of a rectangle.mp4

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005. Area of a rectangle.html

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006. Area of a rectangle using sums and differences.html

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007. Area of a rectangle using sums and differences.mp4

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008. Area of a rectangle using sums and differences.html

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009. Perimeter of a rectangle.html

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010. Perimeter of a rectangle.mp4

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011. Perimeter of a rectangle.html

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012. Area of a parallelogram.html

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013. Area of a parallelogram.mp4

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014. Area of a parallelogram.html

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015. Area of a trapezoid.html

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016. Area of a trapezoid.mp4

00:00
017. Area of a trapezoid.html

00:00
018. Area of a triangle.html

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019. Area of a triangle.mp4

00:00
020. Area of a triangle.html

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021. Finding perimeter using the pythagorean theorem.mp4

00:00
022. Area of a circle.html

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023. Area of a circle.mp4

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024. Area of a circle.html

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025. Circumference of a circle.html

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026. Circumference of a circle.mp4

00:00
027. Circumference of a circle.html

00:00
028. BONUS! Extra practice problems. ).html

00:00
Section Quiz

07. Volume and surface area

001. Introduction to volume and surface area.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Prisms, netsvolumesurface area.html

00:00
004. Prisms, nets.mp4

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005. Prisms, volume.mp4

00:00
006. Prisms, surface area.mp4

00:00
007. Prisms.html

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008. Prisms, surface area to volume ratio of prisms.html

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009. Prisms, surface area to volume ratio.mp4

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010. Prisms, surface area to volume ratio.html

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011. Diagonal of a right rectangular prism.html

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012. Diagonal of a right rectangular prism.mp4

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013. Diagonal of a right rectangular prism.html

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014. Pyramids, netsvolumesurface area.html

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015. Pyramids, nets.mp4

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016. Pyramids, volume.mp4

00:00
017. Pyramids, surface area.mp4

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018. Pyramids.html

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019. Cylinders, netsvolumesurface area.html

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020. Cylinders, nets.mp4

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021. Cylinders, volume.mp4

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022. Cylinders, surface area.mp4

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023. Cylinders.html

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024. Cones, netsvolumesurface area.html

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025. Cones, nets.mp4

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026. Cones, volume.mp4

00:00
027. Cones, surface area.mp4

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028. Cones.html

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029. Spheres, volumesurface area.html

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030. Spheres, volume.mp4

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031. Spheres, surface area.mp4

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032. Spheres.html

00:00
033. BONUS! Extra practice problems. ).html

00:00

08. Triangles

001. Introduction to triangles.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Interior angles of triangles.html

00:00
004. Interior angles of triangles.mp4

00:00
005. Interior angles of triangles.html

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006. Perpendicular and angle bisectors.html

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007. Perpendicular and angle bisectors.mp4

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008. Perpendicular and angle bisectors.html

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009. Circumscribed and inscribed circles of a triangle.html

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010. Circumscribed and inscribed circles of a triangle.mp4

00:00
011. Circumscribed and inscribed circles of a triangle.html

00:00
012. BONUS! Extra practice problems. ).html

00:00
Section Quiz

09. Pythagorean theorem

001. Introduction to pythagorean theorem.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Pythagorean theorem.html

00:00
004. Pythagorean theorem.mp4

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005. Pythagorean theorem.html

00:00
006. Pythagorean inequalities.html

00:00
007. Pythagorean inequalities.mp4

00:00
008. Pythagorean inequalities.html

00:00
009. BONUS! Extra practice problems. ).html

00:00
Section Quiz

10. Congruence

001. Introduction to congruence.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Congruent angles.html

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004. Congruent angles.mp4

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005. Congruent angles.html

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006. Triangle congruence with SSS, ASA, SAS.html

00:00
007. Triangle congruence SSS, ASA, SAS.mp4

00:00
008. Triangle congruence SSS, ASA, SAS.html

00:00
009. Triangle congruence with AAS, HL.html

00:00
010. Triangle congruence AAS, HL.mp4

00:00
011. Triangle congruence AAS, HL.html

00:00
012. Isosceles triangle theorem.html

00:00
013. Isosceles triangle theorem.mp4

00:00
014. Isosceles triangle theorem.html

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015. CPCTC, corresponding parts of congruent triangles are congruent.html

00:00
016. CPCTC, corresponding parts of congruent triangles are congruent.mp4

00:00
017. CPCTC, corresponding parts of congruent triangles are congruent.html

00:00
018. BONUS! Extra practice problems. ).html

00:00
Section Quiz

11. Similarity

001. Introduction to similarity.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Similar triangles.html

00:00
004. Similar triangles.mp4

00:00
005. Similar triangles.html

00:00
006. 45-45-90 triangles.html

00:00
007. 45-45-90 triangles.mp4

00:00
008. 45-45-90 triangles.html

00:00
009. 30-60-90 triangles.html

00:00
010. 30-60-90 triangles.mp4

00:00
011. 30-60-90 triangles.html

00:00
012. Triangle similarity theorems.html

00:00
013. Triangle similarity theorems.mp4

00:00
014. Triangle similarity theorems.html

00:00
015. Triangle side-splitting theorem.html

00:00
016. Triangle side-splitting theorem.mp4

00:00
017. Triangle side-splitting theorems.html

00:00
018. Midsegments of triangles.html

00:00
019. Midsegments of triangles.mp4

00:00
020. Midsegments of triangles.html

00:00
021. Midsegments of trapezoids.html

00:00
022. Midsegments of trapezoids.mp4

00:00
023. Midsegments of trapezoids.html

00:00
024. BONUS! Extra practice problems. ).html

00:00
Section Quiz

12. Transformations

001. Introduction to transformations.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Translating figures in coordinate space.html

00:00
004. Translating figures in coordinate space.mp4

00:00
005. Translating figures in coordinate space.html

00:00
006. Rotating figures in coordinate space.html

00:00
007. Rotating figures in coordinate space.mp4

00:00
008. Rotating figures in coordinate space.html

00:00
009. Reflecting figures in coordinate space.html

00:00
010. Reflecting figures in coordinate space.mp4

00:00
011. Reflecting figures in coordinate space.html

00:00
012. Translation vectors.html

00:00
013. Translation vectors.mp4

00:00
014. Translation vectors.html

00:00
015. BONUS! Extra practice problems. ).html

00:00
Section Quiz

13. Logic

001. Introduction to logic.html

00:00
002. RESOURCE Quiz solutions for this section.html

00:00
003. Conditionals and euler diagrams.html

00:00
004. Conditionals and euler diagrams.mp4

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005. Conditionals and Euler diagrams.html

00:00
006. Converses of conditionals.html

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007. Converses of conditionals.mp4

00:00
008. Converses of conditionals.html

00:00
009. Arranging conditionals in a logical chain.html

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010. Arranging conditionals in a logical chain.mp4

00:00
011. Arranging conditionals in a logical chain.html

00:00
012. BONUS! Extra practice problems. ).html

00:00
Section Quiz

14. Final exam

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About Course

What Will You Learn?

Course Content

01. Getting started

A Message from the Professor

001. Hi! START HERE Course overview.mp4

002. Download the Geometry formula sheet.html

02. Lines

001. Introduction to lines.html

002. RESOURCE Quiz solutions for this section.html

003. Naming simple geometric figures.html

004. Naming simple geometric figures.mp4

005. Naming simple geometric figures.html

006. Length of a line segment.html

007. Length of a line segment.mp4

008. Length of a line segment.html

009. Line segments, slope and midpoint.html

010. Line segments, slope and midpoint.mp4

011. Line segments, slope and midpoint.html

012. Lines, parallel, perpendicular, or neither.html

013. Lines, parallel, perpendicular, or neither.mp4

014. Lines, parallel, perpendicular, or neither.html

015. Distance between two points in two dimensions.mp4

016. Distance between two points in three dimensions.html

017. Distance between two points in three dimensions.mp4

018. Distance between two points in three dimensions.html

019. Midpoint of a line segment in three dimensions.html

020. Midpoint of a line segment in three dimensions.mp4

021. Midpoint of a line segment in three dimensions.html

022. BONUS! Extra practice problems. ).html

Section Quiz

03. Angles

001. Introduction to angles.html

002. RESOURCE Quiz solutions for this section.html

003. Measures of angles.html

004. Measures of angles.mp4

005. Measures of angles with algebra.mp4

006. Measures of angles.html

007. Adjacent and nonadjacent angles.html

008. Adjacent and nonadjacent angles.mp4

009. Adjacent and nonadjacent angles.html

010. Angles of transversals.html

011. Angles of transversals.mp4

012. Angles of transversals.html

013. Interior angles of polygons.html

014. Interior angles of polygons.mp4

015. Interior angles of polygons.html

016. Exterior angles of polygons.html

017. Exterior angles of polygons.mp4

018. Exterior angles of polygons.html

019. BONUS! Extra practice problems. ).html

Section Quiz

04. Quadrilaterals

001. Introduction to quadrilaterals.html

002. RESOURCE Quiz solutions for this section.html

003. Measures of quadrilaterals.html

004. Measures of quadrilaterals.mp4

005. Measures of quadrilaterals.html

006. Measures of parallelograms.html

007. Measures of parallelograms.mp4

008. Measures of parallelograms.html

009. BONUS! Extra practice problems. ).html

Section Quiz

05. Circles

001. Introduction to circles.html

002. RESOURCE Quiz solutions for this section.html

003. Equation of a circle.html

004. Equation of a circle.mp4

005. Equation of a circle.html

006. Degree measure of an arc.html

007. Degree measure of an arc.mp4

008. Degree measure of an arc.html

009. Arc length.html

010. Arc length.mp4

011. Arc length.html

012. Inscribed angles of circles.html

013. Inscribed angles of circles.mp4

014. Inscribed angles of circles.html

015. Vertex on, inside, and outside the circle.html

016. Vertex on, inside, and outside the circle.mp4