SOLUTION: the diagonal of a rectangle measures 5 cm. the width of the rectangle is 3 cm. find the length of the rectangle

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Question 556907: the diagonal of a rectangle measures 5 cm. the width of the rectangle is 3 cm. find the length of the rectangle
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
this shows a 3 4 5 right triangle, it is a basic right triangle in most example books
but if you dont recognize it straight of the bat then this is how you find it
a%5E2%2Bb%5E2=c%5E2
a=3 c=5
3%5E2%2Bb%5E2=5%5E2
9%2Bb%5E2=25
b%5E2=16
b=4
a=3 b=4 c=5 hence the 3 4 5 triangle