Question

If f = 40 cm and g = 41 cm, what is the length of e?

Answer 1

I am so comused  on what to do 

Answer 2

The correct answer is 40! You can use Pythagorean theorem. That is a2+b2=c2. 92+b2=41² 81+b2=1681. Subtract 81 from both sides then do the square root of both sides to = 40. Hope this helps! :D