AnswersMathematical Models with Applications - MA4072 CRArea and Perimeter in ContextQuestion 18
18
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Area and Perimeter in Context

Question 18 • Mathematical Models with Applications - MA4072 CR

A stop sign is in the shape of a regular octagon. A regular octagon can be created using eight triangles of equal area. One triangle that makes up the stop sign has a base of 20 inches and a height of 24 inches. Calculate the area of the stop sign.

Answer
A
1400 sq. in
B
1920 sq. in
C
1980 sq.in
D
1700 sq. in

Explanation

The area of one triangle is (20 × 24) ÷ 2 = 240 square inches. Since the octagon is made of 8 equal-area triangles, its area is 8 × 240 = 1,920 square inches, so the correct choice is 1,920 sq. in.

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