Geometry
Explore plane geometry; coordinates and transformations; space and geometry beyond euclid. Concepts and connections are available independently of video coverage.
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Triangle congruence
Congruent triangles have matching sides and angles under a rigid motion.
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Angles
An angle measures rotation between rays sharing an endpoint.
Triangle similarity
Similar triangles have equal corresponding angles and proportional corresponding sides.
Area and volume
Area measures planar regions and volume measures spatial regions in corresponding squared or cubed units.
Circle geometry
Chord, tangent and inscribed-angle relations connect angles and distances in a circle.
Conic sections
Ellipses, parabolas and hyperbolas arise from planar sections of a cone.
Knowledge connections
- Angles · Related · Map context
- Triangle similarity · Related · Map context