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pi2r can be calculated, but is has no particular mathematical interpretation.
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∙ 11y ago
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The area of a circle is 120 inches what is its circumference?
A = pi r2r2 = A/pir2(1/2) = (A/pi)1/2r = (120/pi)1/2r ≈ 6 inC = 2 pi rC = (2)(pi)(6 in)C ≈ 37.7 in
What is the radius of a circle with circumference of 8 inches?
C = 2*pi*r 8 = 2*pi*r 4 = pi*r r = 4/pi
What happens to the volume of a cylinder if the radius is doubled?
V = (pi)*R2*H if you double the radius then put 2R in place of R in the formula: V = (pi)*(2R)2*H V = 4pi*R2*H So the volume will increase 4 fold if you double the cylinder's radius.
Identify the boundaries of the solution of this inequality 2r 2?
2r
What is pi to the power of infinity?
Infinity.
What is the formula for finding the diameter with the area?
If Area of a circle = (2)(pi)(r), and diameter = 2r, then: diameter = 2r = Area of circle / pi, where pi = 3.14
If the diameter is 3476 what is the circumference?
The formula for the circumference of a circle is: C=2r(pi) Since diameter is the same as 2r, the circumference is 3476(pi).
The area of a circle is 120 inches what is its circumference?
A = pi r2r2 = A/pir2(1/2) = (A/pi)1/2r = (120/pi)1/2r ≈ 6 inC = 2 pi rC = (2)(pi)(6 in)C ≈ 37.7 in
What is the diameter of a circle if the circumference is 71 feet?
d = 2r Circumference = 2*pi*r 71 = 2*pi*r r = 71/(2*pi) 2r = d = 71/pi d = 22.6 approximately
How do you find diameter of a circle with the diameter 10?
You have answered this question for yourself; the answer is '10' Do you mean to ask ; What is the circumference/area of a circle, with a diameter of '10'?. If so , commit to memory ' elementary school maths. A = pi r^2 C = 2 pi r or pi d . From this 2r = d Hence 2r = 10 r = 5 C = 10 pi = 31.41592.... units A = pi 5^2 = 25 pi = 78.5398... units^2
How do you find the radius of a semi circle with an equal perimeter to a rectangle with 1 side 3cm and the other side equal to the radius?
Suppose the radius is R cm. Then the perimeter of the rectangle is 2*(3+R) = 6 + 2R cm. The length of the arc of the semicircle is pi*R and the length of the diameter is 2*R so the perimeter of the semicircle is pi*R + 2R The two perimeters are equal so 6 + 2r = pi*R + 2R That is, 6 = pi*R and so R = 6/pi
How many radius squared areas does it take to fill up a circle?
About 3.14159 of them. (pi) The area of a circle is (pi)r2. The area of the square into which the circle can be inscribed is 4r2 or (2r x 2r).
What is the diameter of a circle if the circumference is 13.4?
If I rememember my geometry correctly, the circumference (C) of a circle is defined by the equation C=2r(pi), where r=the radius of the circle. So:13.4=2r(pi)13.4/pi = 2r divide each side of the equation by pi13.4/3.14 = 2r substitute the rough equivalent value of pi into the equation.divide to find the value of 2r.given that the diameter (d) of a circle = 2r, you have your answer.*** I'm sorry, but it HAS been a while since I've had to compute diameters and I DID originally have the wrong equation. The answer as currently written IS correct, however.
What is the formula for finding circumference of a semi-circle?
2r+pi r
If the radius of a circle is 5 centimeters what is it's circumference?
2r*pi
How do you find the diameter and area of a shape?
Do you mean of a circle? D = 2r A = (pi)r(squared) {Sorry, I don't have the actual symbols on my phone}
Can the area of a circle ever equal the circumference of a circle?
No, no it can't. Circumference = 2r*pi Area = pi*r2 For the area to equal the circumference pi*r2 = pi*2r so divide both sides by pi r2 = 2r so divide both sides by r r = 2 Note that circumference is in units and area is in units squared i.e. radius = 2m, area = 12.56637m2 Ciercumference = 12.56637 m
