SOLUTION: The diagonal of a rectangle is 5 cm and one of side is 4 cm. Find its area

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Question 883679: The diagonal of a rectangle is 5 cm and one of side is 4 cm. Find its area
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
a%5E2+b%5E2=c%5E2
You're given one leg and the hypotenuse.
4%5E2+b%5E2=5%5E2
16+b%5E2=25
Subtract 16 from each side
b%5E2=9
Take the square root
b = 3
.
Your sides are 4 and 3. Multiply to get the area.
4*3=12