Q: What is the area of a regular polygon if the radius is 8 cm?

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Diameter = 2*Radius. So if the diameter is 16 cm, the radius must be 8 cm.

21.4

A circle with a radius of 19 cm has an area of 1,134.11 square cm.

A circle with a radius of 2 cm has an area of 12.57 square cm.

A circle with a radius of 25 cm has an area of 1,963.5 square cm.

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Diameter = 2*Radius. So if the diameter is 16 cm, the radius must be 8 cm.

21.4

4 cm radius = Area of 50.26548 sq. cm.

A circle with a radius of 3 cm has an area of 28.27 square cm.

A circle with a radius of 19 cm has an area of 1,134.11 square cm.

A circle with a radius of 2 cm has an area of 12.57 square cm.

A circle with a radius of 25 cm has an area of 1,963.5 square cm.

The regular 16 sided polygon will consist of 16 congruent isosceles triangles with equal sides of 5.125830895 cm by using the sine rule with equal base angles of 78.75 degrees and an apex angle of 22.5 degrees opposite side of 2 cm. Area of polygon: 0.5*5.125830895^2 *sin(22.5)*16 = 80.43743186 square cm

Area of a circle in square cm = pi*radius squared

8 the answer is 8

A circle with a radius of 4 cm has an area of 50.27 square cm.

A circle with a radius of 2.7 cm has an area of 22.9 square cm.