[MA2015] GEO (9-12) 24 :
24 ) Prove that all circles are similar. [G-C1]
[MA2019] GEO-19 (9-12) 20 :
20. Derive and apply the formula for the length of an arc and the formula for the area of a sector. [MA2019] GEO-19 (9-12) 37 :
37. Investigate and apply relationships among inscribed angles, radii, and chords, including but not limited to: 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.