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Subjects>Math>Algebra

The area of a circle is 81 pi square feet What is the radius?

Anonymous

∙ 13y ago

Updated: 4/28/2022

The area is 9 feet. You find the square root of 81 which is 9.

I want circumference, not area.

Wiki User

∙ 13y ago

What else can I help you with?

Continue Learning about Algebra

What is the area of a circle with 30 ft radius?

A circle with a radius of 30 feet has an area of 2,827.43 square feet.

What is the area of a circle with a radius of 4.3 ft?

A circle with a radius of 4.3 feet has an area of 58.09 square feet.

What is the area of a circle with a radius of 6 ft?

Area of circle = PI * radius^2, so PI * 6^2 = 113.09733553 square feet.

What is the area of circle with a radius of 10 feet?

Area = pi R2 = 100 pi = 314.16 square feet (rounded)

What is the area of circle with a 10 ft radius?

Area of a circle = pi*radius2 Area = 314.159 square feet to 3 decimal places.

Related Questions

What is the area of a circle if the radius of the circle 14 feet?

A circle with a radius of 14 feet has an area of 615.75 square feet.

What is the area of a circle with a radius of 3 feet?

The area of a circle with a radius of 3 feet is: 28.27 square feet.

What is the area of a circle with a radius of 35 feet?

A circle with a radius of 35 feet has an area of 3,848.45 square feet.

What is the area of a circle if the radius is 6.8 feet?

A circle with a radius of 6.8 feet has an area of 145.27 square feet.

What is the area of a circle when the radius is 2.00 feet?

A circle with a radius of 2.00 feet has an area of 12.57 square feet.

What is the area of a circle with a radius of 4 feet?

The area of a circle with a radius of 4 feet is: 50.27 square feet.

What is the area of a circle with 30 ft radius?

A circle with a radius of 30 feet has an area of 2,827.43 square feet.

What is the area of a circle with a radius of 4.3 ft?

A circle with a radius of 4.3 feet has an area of 58.09 square feet.

What is the area of a circle with a radius of 9 ft?

A circle with a radius of 9 feet has an area of 254.47 square feet.

What is the area of a circle if the radius is 10 ft?

A circle with a radius of 10 feet has an area of 314.16 square feet.

What is the area of a circle that has a radius of 40ft?

The AREA of a circle that has a radius of 40ft is 5026.54825 square feet

What is the radius of a circle with an area of 64 square feet?

Radius of circle: square root of (64/pi) = 4.5135166683 feet

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