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The circumference of a circle is calculated using the formula C = 2πr, where C is the circumference, π is a constant approximately equal to 3.14159, and r is the radius of the circle. Given a radius of 20, the circumference would be C = 2 * 3.14159 * 20 = 125.6636 units.

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Multiply the radius by (2 x pi).

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Q: What is the circumference of a circle whose radius is 20?
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What is the radius of a 20 ft circle?

The radius of a circle is the distance from the center of the circle to any point on its circumference. In this case, if the circle has a diameter of 20 feet, the radius would be half of that, which is 10 feet. So, the radius of a 20 ft circle is 10 feet.


find the length of the radius the circumference and the area of the circle the center is 20 feet use 3.14 for pi?

radius = diameter/2 circumference = 2*pi*radius or pi*diameter area = pi*radius2


What would the perimeter of a 20ft semicircle be?

That depends on what you mean by a "20 ft semicircle".A semi-circle is a half circle.A 20 ft circle could be:A circle of diameter 20 ftThe perimeter of the semicircle is half the circumference plus the diameter → perimeter = 1/2π 20 ft + 20 ft= 10π + 20 ft≈ 51.42 ftA circle of radius 20 ftThe perimeter of the semicircle is half the circumference plus double the radius → perimeter = 1/2 2π 20 ft + 2 x 20 ft= 20π + 40 ft≈ 102.08 ftA circle of circumference 20 ftThe perimeter of the semicircle is half the circumference plus the diameter → perimeter = 1/2 20 ft + 20 ft ÷ π= 10 ft + 20/π ft≈ 16.37 ftHowever, if a 20 ft circle is a circle with a circumference (= perimeter) of 20 ft then a 20 ft semi-circle could be a semicircle with a perimeter of 20 ft→ perimeter = 20 ft


How many linear feet in a 6 foot diameter circle?

To find the circumference of a circle with a diameter of 6 feet, you first need to calculate the radius, which is half of the diameter. So, the radius would be 6 feet divided by 2, which equals 3 feet. The formula for the circumference of a circle is 2πr, where r is the radius. Therefore, the circumference of a circle with a 6-foot diameter would be 2 x π x 3 feet, which equals approximately 18.85 feet.


What is the radius of a 20cm circle?

That depends what you mean with "a 20 cm. circle". If 20 cm. is the radius, you already have the answer. If 20 cm. is the diameter, the radius is half the diameter. (10cm)