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Remember the circle eq'n ;-
C = 2 pi r
Hence
When r = 21
C = 2* 3.14 * 21 =
C = 131.88 units.
What else can I help you with?
What is the circumstance if the radius is 21?
The circumstance of a circle is typically referred to as its circumference, which can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. If the radius is 21, the circumference would be ( C = 2\pi \times 21 ), which equals approximately 131.95 when using ( \pi \approx 3.14 ). Thus, the circumference of a circle with a radius of 21 is about 131.95 units.
What is the circumference of a r equals 2 cm circle?
Circumference = 2*pi*r = 12.566 cm (approx)
What is the circumference of a circle with a diameter of 58.4 cm?
the circumference of a circle equals 2x(pi)x(r) r=d/2 r=58.4/2=29.2 the answer =2x(pi)x29.2 =58.4(pi)
What equals circumference in math?
In mathematics, the circumference of a circle is calculated using the formula ( C = 2\pi r ) or ( C = \pi d ), where ( r ) is the radius and ( d ) is the diameter of the circle. The constant ( \pi ) (approximately 3.14159) represents the ratio of the circumference to the diameter of any circle. Thus, the circumference is the total distance around the circle.
What is the approximate circumference of circle r?
Circumference of a circle with radius 'r' = 2(PI)(r) ~ 6.28(r)
What is the circumstance if the radius is 21?
The circumstance of a circle is typically referred to as its circumference, which can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. If the radius is 21, the circumference would be ( C = 2\pi \times 21 ), which equals approximately 131.95 when using ( \pi \approx 3.14 ). Thus, the circumference of a circle with a radius of 21 is about 131.95 units.
What is the radius of a circle if its circumference is 42π?
Circumference = 2Ï€r = 42Ï€ so r = 21 units.
What is the circumference of a r equals 2 cm circle?
Circumference = 2*pi*r = 12.566 cm (approx)
What is C equals R times 2 times Pi?
The circumference of a circle. This is the total amount of length around the circle. C= Circumference R= radius of the circle Pi=3.14159
What is the circumference of a circle and how do you find it?
The circumference of a circle is its perimeter, or the distance around it. It equals 2(pi)r or pi*d, where r is the radius, d is the diameter and pi is 3.14...
What is the circumference of a circle with a diameter of 58.4 cm?
the circumference of a circle equals 2x(pi)x(r) r=d/2 r=58.4/2=29.2 the answer =2x(pi)x29.2 =58.4(pi)
The circumference of a circle is 132cm what is the radius of the circle in centimeters?
To find the radius of a circle when given the circumference, you can use the formula for the circumference of a circle: C = 2πr, where C is the circumference and r is the radius. Given that the circumference is 132 cm, you can plug this value into the formula: 132 = 2πr. To solve for the radius, divide both sides by 2π: r = 132 / (2π) ≈ 21 cm. Therefore, the radius of the circle is approximately 21 centimeters.
What equals circumference in math?
In mathematics, the circumference of a circle is calculated using the formula ( C = 2\pi r ) or ( C = \pi d ), where ( r ) is the radius and ( d ) is the diameter of the circle. The constant ( \pi ) (approximately 3.14159) represents the ratio of the circumference to the diameter of any circle. Thus, the circumference is the total distance around the circle.
What is the approximate circumference of circle r?
Circumference of a circle with radius 'r' = 2(PI)(r) ~ 6.28(r)
How do you find the circumfirence of a circle?
The circumference of a circle is the distance all around the edge of the circle. To find the circumference of a circle, you use the formula C equals 2 times pi times r, where pi is equal to 22 over 7 and r is the radius.
Is c equals 2πr the same as c equals πr squared?
No. C = 2*pi*r is the equation representing the circumference of a circle. The area of a circle is equal to pi*(r^2).
What is the circumference of a circle if the radius is 49?
The circumference of a circle can be calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. If the radius is 49, the circumference would be ( C = 2\pi \times 49 ), which equals approximately 307.76 when using ( \pi \approx 3.14 ). Thus, the circumference of the circle is about 307.76 units.
