What is the area of this figure? Use 3.14 for π.A shape made up of a rectangle of the left and a semicircle on the right. The rectangle has a width of 15 meters and a height of 12 meters.
we know that
The perimeter of the figure is equal to the perimeter of a rectangle plus the circumference of a semicircle minus the diameter of the circle
so
Find the perimeter of the rectangle
The perimeter of the rectangle is equal to
P = 2 (L + W)
substitute the values
P = 2 (15 + 12) = 54 m
Find the circumference of a semicircle
The circumference of a semicircle is equal to
C = `\pi`rC
substitute the value of r
r = `12/2` = 6 m-----> the radius is half the diameter
C = (3.14) (6) = 18.84 m
Find the perimeter of the figure
54 m + 18.84 m - 12 m
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