Aladder is leaning against a building that makes a 32 degree angle with the ground. the top of the ladder reaches 20 feet up on the building. what is the length of the ladder?

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?