For this question, you can find the missing side length by using the Pythagorean Theorem: c² = a² + b²
The two side lengths you are given are 5 cm and 12 cm.
c² = 5² + 12²
c²= 25 + 144
c² = 169
Then find the square root of 169.
c= 13
Therefore the length of c is 13 cm.
