Caleb has a piece of rectangular paper that is 12 inches wide by 16 inches long. He drew a straight line along the diagonal of the paper. What is the length of the line Caleb drew?
Imagine the two sides to be the length and width of a triangle, and the line he drew as the hypotenuse. Thus, we can use the Pythagorean theorem: c² = a² + b² c² = 12² + 16² c² = 144 + 256 c² = 400 c = 20 in.
