Julia drew and labeled the net shown. she also calculated and labeled the areas of the left and right triangle sides rectangular pyramid use julia’s work and finish finding the areas of the faces. what is the surface area of the rectangular pyramid? m2

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?