Circles videos

Circles glossary

Area of a circle intuition

Proof: all circles are similar

Intro to arc measure

Finding arc measures

Finding arc measures with equations

Arc length from subtended angle

Subtended angle from arc length

Radians as ratio of arc length to radius

Intro to radians

Radians & degrees

Degrees to radians

Radians to degrees

Arc length as fraction of circumference

Arc length from subtended angle: radians

Area of a sector

Inscribed angles

Inscribed angle theorem proof

Inscribed shapes: find diameter

Inscribed shapes: angle subtended by diameter

Inscribed shapes: find inscribed angle

Solving inscribed quadrilaterals

Proof: Right triangles inscribed in circles

Inscribed quadrilaterals proof

Proof: radius is perpendicular to a chord it bisects

Proof: perpendicular radius bisects chord

Tangents of circles problem (example 1)

Proof: Radius is perpendicular to tangent line

Proof: Segments tangent to circle from outside point are congruent

Tangents of circles problem (example 2)

Tangents of circles problem (example 3)

Geometric constructions: circle-inscribed equilateral triangle

Geometric constructions: circle-inscribed square

Geometric constructions: circle-inscribed regular hexagon

Geometric constructions: triangle-inscribing circle

Geometric constructions: triangle-circumscribing circle

Geometric constructions: circle tangent

Geometric constructions: circle tangent (example 2)