Khan Academy | Khan Academy
Explore geometry concepts including angles, shapes, transformations, and proofs with Khan Academy's engaging resources.
High school geometry - Khan Academy
Learn high school geometry—transformations, congruence, similarity, trigonometry, analytic geometry, and more (aligned with Common Core standards).
Geometry (TX TEKS) | Math | Khan Academy
Learn high school geometry—reasoning with two-dimensional and three-dimensional figures visually and algebraically. This course aligns with TX TEKS standards.
Transformations | Geometry (all content) | Math | Khan Academy
Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 2 Angles Unit 3 Shapes
Angles | Geometry (all content) | Math | Khan Academy
Parallel & perpendicular lines Missing angles with a transversal Parallel lines & corresponding angles proof Missing angles (CA geometry) Proving angles are congruent Proofs with transformations Practice
Analytic geometry | High school geometry | Math | Khan Academy
In analytic geometry, also known as coordinate geometry, we think about geometric objects on the coordinate plane. For example, we can see that opposite sides of a parallelogram are parallel by …
Lines | Geometry (all content) | Math | Khan Academy
Geometry (all content) 17 units · 180 skills Unit 1 Lines Unit 2 Angles Unit 3 Shapes
Geometric constructions | Geometry (all content) - Khan Academy
We now have fancy computers to help us perfectly draw things, but have you ever wondered how people drew perfect circles or angle bisectors or perpendicular bisectors back in the day. Well this …
Khan Academy | Khan Academy
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Now Live: Khan Academy’s New TEKS-Aligned Geometry and …
Jul 30, 2025 · Explore Khan Academy’s free, TEKS-aligned Geometry and Precalculus courses designed to build deep understanding, strengthen problem-solving skills, and prepare Texas high …