Question

The diameter of a circle has endpoints P(-10,-2) and Q(4,6).
a. Find the center of the circle.
b. Find the radius.
c. Write an equation for the circle.

Answer 1

a. Use the midpoint formula.
b. Use the distance formula and then divide by 2.
c. (x - h)^2 + (y - k)^2 = r^2
Basically reverse the center coordinates and add it to x and y. Then square the radius and put it for r^2.

Answer 2

Thank you!