Question

Can someone teach me how to do this?

Answer 1

Explanation:

`pythagorean \: theorem \\ {hypothenes}^(2) = { {x}^(2) + {y}^(2) } \\ {17}^(2) = {x}^(2) + {15}^(2) \\ 289 = {x}^(2) + 225 \\ {x}^(2) = 64 \\ x = 8cm`