Right Triangle – A triangle with one right angle. Hypotenuse – Side opposite the right angle and longest side of a right triangle. Leg – Either of the two sides that form the right angle. Leg Hypotenuse
In a right triangle, if a and b are the measures of the legs and c is the measure of the hypotenuse, then a 2 + b 2 = c 2. This theorem is used to find the length of any right triangle when the lengths of the other two sides are known. b a c
Example 1: Find the length of the hypotenuse of a right triangle if a = 3 and b = c a 2 + b 2 = c 2
Example 2: Find the length of the leg of the following right triangle a a 2 + b 2 = c 2 __________________
Example 3: Find the length of the hypotenuse c when a = 11 and b = 4. Solution Solution 11 4 SOLUTION c
Copy this triangle into your maths books. Complete using the Pythagoras’ Theorem formula. C 12 10