Geometry › Inscribed angles

CCSS.MATH.CONTENT.HSG.C.A.2
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.

LTI launch URL (help)
https://schoolyourself.org/page/lti/sy/geometry/inscribed-angle