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BECE Mathematics 2011 Paper

Question : 16

Total: 40

Solution:

Perimeter is the sum of all the length of each side of a shape. Square has 4 equal sides.

Perimeter of a square

=

Length + Length + Length + Length

Let

L=

the length of each sides of the square.

28=L+L+L+L

28=4 L

Divide both sides by 4 to get the length of the square.

L=\frac{28}{4}=7\ \mathrm{cm}

Area of a square

=

Length

x

Length

\text{ Area }=7\ \mathrm{cm} \times 7\ \mathrm{cm}=49\ \mathrm{cm}^2

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