G.C.2

(9/10) Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle.

Khan Academy Resources

Challenge problems: Inscribed anglesChallenge problems: radius & tangentInscribed angle theorem proofDetermining tangent lines: anglesChallenge problems: Inscribed shapesDetermining tangent lines: lengthsChallenge problems: circumscribing shapesInscribed anglesTangents of circles problemsInscribed shapesInscribed angle theorem proofProof: Right triangles inscribed in circlesCircles glossaryProof: radius is perpendicular to a chord it bisectsProof: perpendicular radius bisects chordInscribed shapes: find inscribed angleTangents of circles problem (example 1)Inscribed shapes: find diameterInscribed anglesProof: Radius is perpendicular to tangent lineInscribed shapes: angle subtended by diameterTangents of circles problem (example 3)Proof: Segments tangent to circle from outside point are congruentTangents of circles problem (example 2)

1-on-1 AI tutoring aligned to G.C.2. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →