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A sector of a circle with radius 8 cm has central angle 4/7. a. Find the area

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A sector of a circle with radius 8 cm has central angle 4π/7.
a. Find the area of the sector.
b. Set up a proportion of the area of the sector to the total area of the circle, and a proportion of the central angle of the sector to the total central angle measure.
c. Solve your proportion from 13b to show that the formula you used in 13a is correct.
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