Pythagorean theoremThe pythagorean theorem states that, in a right triangle, if you call the hypotenuse c and the other 2 sides a and b, then: And so, to determine c, the hypotenuse, you must take the square root: For example, in a right triangle that has side a = 3 inches and side b = 4 inches, then the hypotenuse (side c) = : c^{2} = 3^{2} + 4^{2} = 9 + 16 = 25. So c is the square root of 25: _{}, which is 5. If you know the hypotenuse and one of the other two sides of a right triangle, you can use the pythagorean theorem to find the missing side by rearranging the pythagorean theorem formula. For example, if you call the missing side "b", then: So, b = √ (c 2  a 2)
