Math: High school & college Ages 14-18 ● Media ready

High school geometry

Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more (aligned with Common Core standards).

9 units 62 lessons 119 videos 10 on CDN

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Unit 2 Performing transformations

1 Intro to Euclidean geometry Free 3 video(s) ● 2 Introduction to rigid transformations Free 3 video(s) ● 3 Translations Free 4 video(s) ● 5 Rotations 🔒 Pro 7 Reflections 🔒 Pro 1 video(s) 9 Dilations 🔒 Pro 2 video(s) 8 Solid geometry: Unit test 🔒 Pro

Unit 3 Transformation properties and proofs

1 Rigid transformations overview 🔒 Pro 2 Dilation preserved properties 🔒 Pro 4 Properties & definitions of transformations 🔒 Pro 3 video(s) 5 Symmetry 🔒 Pro 3 video(s) 6 Proofs with transformations 🔒 Pro 1 video(s)

Unit 4 Congruence

1 Transformations & congruence 🔒 Pro 2 video(s) 2 Triangle congruence from transformations 🔒 Pro 4 video(s) 3 Congruent triangles 🔒 Pro 5 video(s) 5 Theorems concerning triangle properties 🔒 Pro 2 video(s) 6 Working with triangles 🔒 Pro 3 video(s) 8 Theorems concerning quadrilateral properties 🔒 Pro 6 video(s) 9 Proofs of general theorems 🔒 Pro 3 video(s) 10 Constructing lines & angles 🔒 Pro 4 video(s)

Unit 5 Similarity

1 Definitions of similarity 🔒 Pro 2 Introduction to triangle similarity 🔒 Pro 4 Solving similar triangles 🔒 Pro 5 Angle bisector theorem 🔒 Pro 2 video(s) 7 Solving problems with similar & congruent triangles 🔒 Pro 2 video(s) 8 Proving relationships using similarity 🔒 Pro 2 video(s) 9 Solving modeling problems with similar & congruent triangles 🔒 Pro 3 video(s)

Unit 6 Right triangles & trigonometry

1 Pythagorean theorem 🔒 Pro 1 video(s) 2 Pythagorean theorem proofs 🔒 Pro 3 Special right triangles 🔒 Pro 4 video(s) 5 Ratios in right triangles 🔒 Pro 6 Introduction to the trigonometric ratios 🔒 Pro 7 Solving for a side in a right triangle using the trigonometric ratios 🔒 Pro 8 Solving for an angle in a right triangle using the trigonometric ratios 🔒 Pro 10 Sine & cosine of complementary angles 🔒 Pro 4 video(s) 11 Modeling with right triangles 🔒 Pro 1 video(s)

Unit 7 Analytic geometry

1 Distance and midpoints 🔒 Pro 2 Dividing line segments 🔒 Pro 3 video(s) 4 Problem solving with distance on the coordinate plane 🔒 Pro 4 video(s) 6 Parallel & perpendicular lines on the coordinate plane 🔒 Pro 3 video(s) 7 Equations of parallel & perpendicular lines 🔒 Pro

Unit 8 Conic sections

1 Graphs of circles intro 🔒 Pro 2 video(s) 2 Standard equation of a circle 🔒 Pro 4 Expanded equation of a circle 🔒 Pro 5 Focus and directrix of a parabola 🔒 Pro

Unit 9 Circles

1 Circle basics 🔒 Pro 2 video(s) 2 Arc measure 🔒 Pro 3 video(s) 3 Arc length (from degrees) 🔒 Pro 2 video(s) 5 Introduction to radians 🔒 Pro 1 video(s) 6 Arc length (from radians) 🔒 Pro 2 video(s) 7 Sectors 🔒 Pro 1 video(s) 9 Inscribed angles 🔒 Pro 2 video(s) 10 Inscribed shapes problem solving 🔒 Pro 4 video(s) 11 Proofs with inscribed shapes 🔒 Pro 4 video(s) 12 Properties of tangents 🔒 Pro 5 video(s) 14 Constructing regular polygons inscribed in circles 🔒 Pro 1 video(s) 15 Constructing circumcircles & incircles 🔒 Pro 2 video(s) 16 Constructing a line tangent to a circle 🔒 Pro 2 video(s)

Unit 10 Solid geometry

1 2D vs. 3D objects 🔒 Pro 2 video(s) 3 Cavalieri's principle and dissection methods 🔒 Pro 4 video(s) 5 Volume and surface area 🔒 Pro 6 Density 🔒 Pro 2 video(s)