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10.5 inches
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∙ 12y ago
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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 circumference of a 21-inch circle how can solve?
By a 21-inch circle I presume you mean that the diameter is 21 inches. So the radius is half as long, 10.5 inches. The formula for the circumference of a circle is 2 pi r, where r is the radius. Pi is about 3.14. That is accurate to 2 decimals, or 3 significant digits all together. I use that approximation because the dimension we are given has 2 significant digits. So the circumference is pi times the diameter; we multiply 3.14 by 21 inches and get 65.94. To 2 significant digits, that is 66 inches. If you meant that the radius was 21 inches, then the circumference would be twice as much, or 132 inches.
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 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
How man square feet in a 21ft diameter circle?
The area of a circle can be calculated using the formula: A = πr^2. If the diameter is 21ft, the radius would be half of that, which is 10.5ft. The area of the circle would be approximately 346 square feet.
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 radius of a 42 inch circle?
21 inches.
What is the perimeter of 21 of a circle?
The perimeter which is the circumference of a circle is: pi*diameter or 2*pi*radius
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 circumference of a 21-inch circle how can solve?
By a 21-inch circle I presume you mean that the diameter is 21 inches. So the radius is half as long, 10.5 inches. The formula for the circumference of a circle is 2 pi r, where r is the radius. Pi is about 3.14. That is accurate to 2 decimals, or 3 significant digits all together. I use that approximation because the dimension we are given has 2 significant digits. So the circumference is pi times the diameter; we multiply 3.14 by 21 inches and get 65.94. To 2 significant digits, that is 66 inches. If you meant that the radius was 21 inches, then the circumference would be twice as much, or 132 inches.
If a circle has the diameter of 21 what is the circumference?
The circumference of a circle is diameter times pi or pi times the radius doubled. Pi is equivalent to 22/7. Multiply 21 by 3.14 which gives you 65.999999... 7
What is the perimeter of 21 mi of a circle?
The perimeter of a cirlcle is its circumference which is: 2*pi*radius or diameter*pi
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 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 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 man square feet in a 21ft diameter circle?
The area of a circle can be calculated using the formula: A = πr^2. If the diameter is 21ft, the radius would be half of that, which is 10.5ft. The area of the circle would be approximately 346 square feet.
