Jefrrey, this is the solution:
We will use the Pythagorean theorem to find out the missing side length, as follows:
• a = 15
,
• b = 8
,
• c = Hypotenuse
c² = a² + b ²
c² = 15² + 8²
c² = 225 + 64
c² = 289
Square root at both sides:
√c² = √289
c = 17 inches
The missing side length is 17 inches