Question

What is the answer I don't know how to solve this!

Answer 1

$a = 9$

$b = 12$

$c = \sqrt{ {a}^{2} + {b}^{2} } = \sqrt{ {9}^{2} + {12}^{2} } = \sqrt{81 + 144} = \sqrt{225} = 15$

$p = a + b + c = 9 + 12 + 15 = 36$

Answer: 36.