Babylonian Math Problem
Here's the problem:
Suppose you have two equilateral triangles, one inside the other. Can you figure out the area of the space between the two triangles? Here's a hint: see how you can divide the area into three trapezoids?
A better drawing of the problem
You'll need to know how to find the area of a trapezoid. (Scroll down for a better drawing of the problem)
Science in Ancient Mesopotamia, by Carol Moss (1999). Easy reading. On the short side.