please help.
a = 5 ft, b = 12 ft
&
b = 5 in, c = 15 in.

Pythagorean theorem
a^2+b^2=c^2
a=c^2-b^2
Step-by-step explanation:
c=a^2+b^2
5^2+12^2=13
a=c^2-b^2
15^2-5^2= 14.1