Area of squares and rectangles

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TACHS Math › Area of squares and rectangles

Questions 1 - 2
1

A square has perimeter 24 feet. Give its area.

36 square feet

576 square feet

144 square feet

18 square feet

Explanation

The perimeter of a figure is the sum of the lengths of its sides. A square comprises four sides of equal length, so, if the perimeter of the square is 24 feet, then each side has length

feet.

The area of the square is equal to the length of a side multiplied by itself, so the area of this square is

square feet.

2

Jennifer wants to wallpaper her room which is made up for four rectangular walls each measuring at feet by feet. If each roll of wallpaper covers square feet of space, how many rolls of wallpaper will Jennifer need?

Explanation

Start by finding out the total square footage of wallpaper needed.

Find the area of one wall. Recall that in order to find the area of a rectangle, you must multiply the length by the width.

Since we have four identical walls,

Now divide this by the amount of square feet covered by each roll of wallpaper to find how many rolls are needed.

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