SOLUTION: A rectangle has a breadth of 6 cm and a diagonal of 12 cm. Calculate the perimeter of the rectangle correct to the nearest whole centimetre. I've been stuck on this question fo

Algebra ->  Rectangles -> SOLUTION: A rectangle has a breadth of 6 cm and a diagonal of 12 cm. Calculate the perimeter of the rectangle correct to the nearest whole centimetre. I've been stuck on this question fo      Log On


   

Question 1002018: A rectangle has a breadth of 6 cm and a diagonal of 12 cm.
Calculate the perimeter of the rectangle correct to the nearest whole centimetre.
I've been stuck on this question for a while and don't know how to solve it, can you please help me?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!

x^2 + 6^2 = 12^2
x^2 = 12^2 -6^2
x^2= 108
x=+sqrt%28108%29

x=6sqrt%283%29
perimeter = 2 (l+b)
=2%2A%286%2A%28sqrt%28%283%29%29%2B6%29%29

= 2%2A6%28sqrt%283%29%2B1%29
= 12%2A%28%28sqrt%283%29%29%2B1%29%29