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erica [24]
3 years ago
9

A semicircle is attached to the side of a rectangle as shown.

Mathematics
1 answer:
Genrish500 [490]3 years ago
6 0

Answer:

58.8\ mm^{2}

Step-by-step explanation:

we know that

The area of the figure is equal to the area of a rectangle plus the area of semicircle

Step 1

Find the area of the rectangle

The area of the rectangle is equal to

A=bh

we have

b=9\ mm

h=3\ mm

substitute

A=9*3=27\ mm^{2}

Step 2

Find the area of semicircle

The area of semicircle is equal to

A=\frac{1}{2}\pi r^{2}

we have

r=9/2=4.5\ m

substitute

A=\frac{1}{2}(3.14)(4.5^{2})=31.8\ mm^{2}

Step 3

Find the area of the figure

27\ mm^{2}+31.8\ mm^{2}=58.8\ mm^{2}


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