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346.36 square units.

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Q: What is the area of a circle with the diameter is 21?
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What is the area of a circle with a diameter of 21?

Area of a circle = pi*radius2 Area = pi*10.52 = 346.3605901 square units


What is the area of a circle that has a diameter of 42 yards?

A circle with a radius of 21 yards has an area of 1,385.44 square yards.


What is the base area of a cylinder with the diameter of 21?

Its just the area of a circle 21 inches or 21 centimeters? area of a circle is (pi)*r2 where pi = 3.1415.... and r = radius thus A = (3.1415)*(diameter/2)2 u can figure out the answer from that with a calculator


What is the circumference of a circle that has a diameter of 21?

The circumference of a circle that has a diameter of 21 is about 65.97


What is the diameter of a circle with a area of 37.68?

The diameter of a circle with an area of 37.68 is 6.92


If a circle has a diameter of 21 feet what is the circumference?

If a circle has a diameter of 21 feet the circumference is: 65.97 feet (diameter x Pi = circumference).


What is the area of a circle with the diameter of 3m?

The area of a circle with the diameter of 3m is 7.069 m2


What is the area of a circle with diameter of 4.9?

The area of a circle with diameter of 4.9 is 75.43 units2


How do I figure the area of a circle by diameter?

To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)


What is the area of a circle with a diameter of 9.4 m?

The area of a circle with a diameter of 9.4 m is: 69.4 m2


If area of circle is 100pi what is the diameter?

Oh, isn't that a happy little question! If the area of a circle is 100π, we can use the formula for the area of a circle, which is πr^2. So, 100π = πr^2. By solving for the radius (r), we find that the radius is 10 units. And since the diameter is just twice the radius, the diameter would be 20 units.


What is the area of a circle that is 8 feet in diameter?

A circle with a diameter has an area of 50.265486543928724876568901 sq. ft.