Question

Maryam's rectangular bedroom is 9 feet by 12 feet. What is the diagonal distance from one corner to the opposite corner?

Answer 1

Create a right triangle with the the two legs being sides of 9 and 12...then use the Pythagorean theorem to solve

a^2 + b^2 = c^2 

9^2 + 12^2 = c^2
81 + 144 = c^2 
225 = c^2 

Square root both sides to get c = 15 feet.