## Select a standard

HSG‑C.A.1 Prove that all circles are similar.
HSG‑C.A.2 Identify and describe relationships among inscribed angles, radii, and chords. Include the...
HSG‑C.A.3 Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles...
HSG‑C.A.4 $(+)$Construct a tangent line from a point outside a given circle to the circle.