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what is the area of a rectangle when one side is 9 m and the perimeter is 30 m?

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what is the area of a rectangle when one side is 9 m and the perimeter is 30 m?

perimeter-of-a-rectangle
area-of-a-rectangle

asked Dec 9, 2013 in GEOMETRY by rockstar Apprentice

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1 Answer

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Rectangle perimeter 2(l+b) = 30m

If one side l = 9, 2(9+b) = 30

18+2b = 30

Subtract 18 from each side.

18-18+2b = 30-18

2b = 12

Divide to each side by 2.

2b/2= 12/2

Another side b = 6

Area of rectangle = l *b = 9*6 = 54 square meters.

answered Dec 9, 2013 by william Mentor

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