Question

The perimeter of a rectangle is 80 inches, if the width is 18 inches what is the area of the rectangle? A.22 sq.in B.324 sq.in C.396 sq.in D.6,400 sq.in

Answer 1

396 in^2

Explanation:

The perimeter of a triangle is given by the formula:

● P = 2w+2L

L is the length and w is the width

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The width hereis 18 inches and the perimeter is 80 inches.

Replace w by 18 and P by 80 to find L.

● P= 2L+2w

● 80 = 2L + 2×18

● 80 = 2L + 36

Substrat 36 from both sides

● 80-36 = 2L+36-36

●44 = 2L

Divide both sides by 2

● 44/2 = 2L/2

● 22 = L

So the length is 22 inches

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The area of a rectangle is given by the formula:

● A= L×w

● A = 22×18

● A = 396 in^2