50 points.
Find the area of the shaded regions:

18 pi cm^2

18 (3.14) =56.52 cm^2

or use the pi button 56.54866776 cm^2

Step-by-step explanation:

First find the area of the entire circle

A = pi r^2

A = pi 9^2

A = 81 pi

The area of a circle is 360 degrees.  The shaded area is 80 degrees

Take the fraction of the circle that is shaded and multiply by the total area

80/360 * 81 pi

2/9 * 81 pi

18 pi

We can approximate pi

18 (3.14) =56.52

or use the pi button

56.54866776

i not know

step-by-step explanation:

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