Question

Find the area of the figure to the nearest tenth.

a.

77.9 sq mm

c.

70 sq mm


b.

72.5 sq mm

d.

540 sq mm

Answer 1

Look at the picture in the attachment.
The area of the figure is equal to the sum of the areas A₁ and A₂.


`A_1=9 \ mm * 4.8 \ mm=43.2 \ mm^2 \\ A_2=(9 \ mm * 7.7 \ mm)/(2)=(69.3 \ mm^2)/(2)=34.65 \ mm^2 \\ \\ A=43.2 \ mm^2 + 34.65 \ mm^2=77.85 \ mm^2 \approx 77.9 \ mm^2`

The answer is A.