Pleaseee help me!! i need this answe ASAP

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32