Mrs. wilkerson cut some oranges into 20 equal pieces to be shared by 6 friends. how many pieces did each person get and how many pieces were left over ?

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?