h²=p²+b²
20²=x²+12²
400-144=x²
256=x²
16²=x²
square will be cancelled so answer is 16
Answer:
h²+b²=H²
x²+12²=20²
x²=20²-12²
x²=400-144
x²=256
look for the square root,,,which is 16
and so x=16
