Use the Pythagorean theorem

A^2+ 18in^2= 82in^2

1 answer

To solve for A using the Pythagorean theorem, we can rearrange the formula to isolate A:

A^2 = 82in^2 - 18in^2
A^2 = 64in^2

Taking the square root of both sides to solve for A:

A = √64in^2
A = 8in

Therefore, the length of side A is 8 inches.