Brain Teasers
Find the Area
Five congruent squares are put together without gaps or overlap to form a figure shaped like a plus sign. The perimeter of the figure is 72 cm. Find the area of the figure, in sq cm.
Hint
Find the length of one side of the figure.Answer
Answer: 180 square centimetersExplanation: Because the five squares are congruent, the 12 sides of the figure are all equal in length. Then the length of one side is 72/12 = 6 cm. Therefore, the area of each square is 36 sq cm and the area of the figure, 5 x 36, is 180 sq cm.
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