Question

Will mark brainiest, please explain

Answer 1

Imagine cutting this shape into two semi-circles and one rectangle.

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• Each semi-circle has a diameter of 36 meters
• The radius would be (36/2) = 18 meters.

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We know the area of a whole circle which is π$r^{2}$

• The formula of area of a semi-circle:  1/2(π$r^{2}$)

because a semi-circle is basically half of the whole circle!

However, since we have two equal semi-circles...we can just put them together and solve for the whole circle's area.

for reference:

1/2(π$r^{2}$) + 1/2(π$r^{2}$) = 2/2(π$r^{2}$) = π$r^{2}$

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First, the area of rectangle: length times width = 84 x 36 = 3024 square meters

Anyways, since we have to sub in 3.14 for π

Area of a whole circle: (3.14 x $r^{2}$) = (3.14 x $18^{2}$) = 1017.36 square meters

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3024 + 1017.36 = 4041.36 square meters

ANSWER: J