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8_murik_8 [283]
4 years ago
6

Need help on this problem

Mathematics
1 answer:
andreyandreev [35.5K]4 years ago
6 0

Answer:

18 pi mm^2

Step-by-step explanation:

First we find the area of the circle

A = pi r^2

A = pi (9)^2

A = 81 pi

The we find the fraction of the circle that is shaded

The degrees in a circle is 360

80 degrees are shaded

80/360 =2/9

Multiply the area by the fraction that is shaded

A shaded =2/9*81 pi = 18 pi

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