Khan Academy

Inscribed angles Video (K-A)

Challenge problems: Inscribed shapes (K-A)

Inscribed quadrilaterals proof (K-A)

Inscribed shapes: angle subtended by diameter (K-A)

Inscribed shapes: find diameter (K-A)

Inscribed shapes: find inscribed angle (K-A)

Proof: Right triangles inscribed in circles (K-A)

Solving inscribed quadrilaterals (K-A)

Challenge problems: circumscribing shapes (K-A)

Challenge problems: radius & tangent (K-A)

Determining tangent lines: angles (K-A)

Determining tangent lines: lengths (K-A)

Proof: Radius is perpendicular to tangent line (K-A)

Proof: Segments tangent to circle from outside point are congruent (K-A)

Tangents of circles problem (example 1) (K-A)

Tangents of circles problem (example 2) (K-A)

Area of inscribed equilateral triangle (K-A)

Proof: perpendicular radius bisects chord (K-A)

Tangents of circles problem (example 3) (K-A)

Proof: radius is perpendicular to a chord it bisects (K-A)

Geometric constructions: circle-inscribed equilateral triangle (K-A)

Geometric constructions: triangle-circumscribing circle (K-A)

Geometric constructions: circle-inscribed square (K-A)

Geometric constructions: circle-inscribed regular hexagon (K-A)

Geometric constructions: triangle-inscribing circle (K-A)