Imagine we want to measure the exact diagonal of a square tile. No matter how hard we try, we won't get it as a neat fraction.| Math is Fun
Over 2000 years ago there was an amazing discovery about triangles: When a triangle has a right angle (90°) ...| Math is Fun
Draw a circle with a diameter (all the way across the circle) of 1 ... Then the circumference (all the way around the circle) is 3.14159265... a number known as Pi| www.mathsisfun.com