You are building a rectangular garden and would like the area to be 32 square feet and the length twice the size as the width. what should the dimensions of your garden be?

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?