Question

A diameter of a circle has endpoints P(3, 6) and A(0, 2). What is the length of the diameter?

Answer 1

Use the distance formula: \[\sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}\], so you get: \[\sqrt{(0-3)^2 + (2-6)^2}\] which equals: 5.