A B and C are points on the circumference of a circle. XY is a tangent to the circle at the point A. Angle BAY=72 and angle ABC=54.

Prove that triangle ABC is an isosceles triangle.
You must give a reason for any statement or any calculation you carry out.

( do not answer if you don't know the answer, thank you.)

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext