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the area of a circle is represented by the following equation; A=pi*R2 where A is area, pi is the number pi (3.1415926.......for most high school maths, 3.14 is suitable) and R is the radius. So, square your radius, and multiply it by pi.
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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 diameter of a circle with a radius of 21 ft?
If radius=21 ft, then diameter = 2*radius = 42 ft
What is the circumference of a circle with radius of 21 cm?
132cm
What is the radius of a circle with a 21 inch circumference?
the radius is 10.5 inches. * * * * * Wrong! Circumference = 2*pi*Radius Or, Radius = Circumference/(2*pi) So circumference = 21 inches implies radius = 3.34 inches (to 3 sf)
How many square feet in a 42 inch diameter circle?
The radius of the circle is 21 inches. The area of the circle is (pi) times (radius squared) = pi times 441 = 1,385.44+ square inches. 1 square foot = 144 square inches. The area of the circle is (1385.44+ square inches) divided by 144 = 9.621 square feet (rounded to 3 decimal places).
What is the area of a circle with a radius of 21 centimeters?
About 1385.44cm2
What is the area of a circle with the radius of 21?
The area of a circle of radius 21 is 1386
What is the approximate area of a circle whose radius is 21 cm?
A circle with a radius of 21 cm has an area of ~1,385.44 square cm
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 area of a circle with a radius of 21 feet?
Using 3.14 as Pi the area of circle is: 1384.74
What is the area of a circle if the radius is twenty-one?
A circle with a radius of 21 units has an area of 1,385.44 square units.
What is the area of a circle when the radius is 21?
Area = pi*212
What is the area of a circle if the radius is 21?
Using 3.14 as Pi the area of circle is: 1384.74
What is the area of a circle with a radius of 21 cm?
About 1385.44cm2
How many miles in a 21 mile radius?
If the area is a circle and the radius of the circle is 21 miles, the distance around the circle (circumference) is 131.95 miles. The area of that circle is 1,385.4 square miles.
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 approximate area of a circle with a radius of 21 ft?
The area is 441 times pi.
