SOLUTION: What is the length of a diagonal of the rectangle that is 5 inches wide and 12 inches long? A) 7in B) 8.5in C) 13in D) 15in

Algebra ->  Rectangles -> SOLUTION: What is the length of a diagonal of the rectangle that is 5 inches wide and 12 inches long? A) 7in B) 8.5in C) 13in D) 15in      Log On


   

Question 258572: What is the length of a diagonal of the rectangle that is 5 inches wide and 12 inches long?
A) 7in
B) 8.5in
C) 13in
D) 15in
Answer by Nikki456(9) About Me  (Show Source):
You can put this solution on YOUR website!
You could use the Pythagorean theorem, which is a%5E2%2Bb%5E2=+c%5E2.so suppose 5 is a and 12 is b. You plug in values. So you do 5%5E2%2B12%5E2=c%5E2. when you simplify that, you get 25+144=c^2. So you add and get 169=c^2. So when you do the square root of c^2, which is c, you have to do it to 169. The square root is 13. So c=13 in.