In Exercises 7 graph JKL with vertices J(3, 1), K(4,2), and L(1, 3) and its image after the glide reflection. translation: (x, y) (x-6,y-1) reflection: in the line y=-x

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?