SOLUTION: A rectangle has a perimeter of 20 and a width of 4, what is the length of its diagonal?

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Question 272896: A rectangle has a perimeter of 20 and a width of 4, what is the length of its diagonal?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
20=2*L+2*4
12=2*L
6=L
4=W
6^2+4^2=d^2
36+16=d^2
52=d^2
d=sqrt(52)
d=sqrt(4*13)=2sqrt(13)=7.211