Answer:
12 in and 36 in
Step-by-step explanation:
(A)
Using Pythagoras' identity in the right triangle
b² + 9² = 15²
b² + 81 = 225 ( subtract 81 from both sides )
b² = 144 ( take the square root of both sides )
b = [tex]\sqrt{144}[/tex] = 12 in
(B)
The perimeter is the sum of the 3 sides, thus
perimeter = 15 + 9 + 12 = 36 in
