SOLUTION: If a rectangle has an area of 144ft squared, its length is 18 ft, and the width is 8 ft. What is the length of the diagonal? I dont know how to find it.

Algebra ->  Rectangles -> SOLUTION: If a rectangle has an area of 144ft squared, its length is 18 ft, and the width is 8 ft. What is the length of the diagonal? I dont know how to find it.      Log On


   

Question 403586: If a rectangle has an area of 144ft squared, its length is 18 ft, and the width is 8 ft. What is the length of the diagonal? I dont know how to find it.
Found 2 solutions by Alan3354, mananth:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
d%5E2+=+18%5E2+%2B+8%5E2+=+324+%2B+64+=+388
d+=+sqrt%28388%29
d =~ 19.7 ft

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
If a rectangle has an area of 144ft squared, its length is 18 ft, and the width is 8 ft. What is the length of the diagonal? I dont know how to find it.
...
the diagonal and the sides of the rectangle form a right triangle.
Th diagonal D is the hypotenuse and the sides of the rectangle are the legs of the triangle.
...
8^2+18^2= D^2
64+324= D^2
384=D^2
sqrt%28D%5E2%29=+sqrt%28384%29
D = 19.6 ft