Question

Please help with picture below

Answer 1

you are trying to find the leg or height. since you already have the hypotnose and another leg or base. so you plug it in the pathgoren theorem. base =5
hypotnose= 12
a^2+b^2=c^2

`{5}^(2 ) + {x}^(2) = {12}^(2)`
that's #3