Which of the following sets could be the sides of a right triangle? {2, 3, }
{2, 2, 4}

(1, 3, }What is the equation of a circle whose center is at the origin and whose radius is 16?

x 2 + y 2 = 256
x 2 + y 2 = 4
x 2 + y 2 = 16

What is the midpoint of the line segment whose endpoints are (-8, 12) and (-13, -2)?

(-10.5, 7)
(-10.5, 5)
(-2.5, 7)