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pi is the constant value that was given by ARYABHATTA was 3.141 and here "r" is nothing but radius
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What does 2 pi r or 2 pi radius mean?
2 x Pi x r is equal to the circumference of a circle whose radius is equal to r.
Is 2Pi r the same as Pi r squared?
No. 2Pi r is equal to Pi d, though.
Why is circumference equal to 2 times Pi times r?
circumference=pi circumference=pi circumference=pi
What is the formula using pi for the area of a circle?
area of a circle is equal to pi times the square of its radius.. A=(pi)r^2
Surface area of a cylinder?
A cylinder of radius R and length L has a surface area equal to: Area = Area of 2 Circular Faces + Area of Tube = 2 * Pi * R2 + 2 * Pi * R * L Area = 2 * Pi * R * (R+L) where Pi = 3.14 (rounded) Another way to look at it is: 2 * Pi * R2 + Pi * d * h. H= height R= radius D= diameter 2= squared
What does 2 pi r or 2 pi radius mean?
2 x Pi x r is equal to the circumference of a circle whose radius is equal to r.
Is 2Pi r the same as Pi r squared?
No. 2Pi r is equal to Pi d, though.
Why is circumference equal to 2 times Pi times r?
circumference=pi circumference=pi circumference=pi
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
Q149 The perimeter of a circle and square are equal The ratio of their area is?
Equal perimeters:2 pi R = 4 spi R = 2 ss = pi R / 2Ratio of areas:pi R2 / s2 = (4 pi R2) / (pi2 R2) = 4 / pi= 1.2732 (rounded)The area of the circle is [ (4/pi) x (area of the square) ].
What the answer to the area of a circle?
The area of a circle = Pi*r2 where r is the radius and Pi is approximately equal to 3.14
What is the area of a circle that has a radius equal to 1?
a=pi times r squared so pi or 3.1415926535898...
What is the formula using pi for the area of a circle?
area of a circle is equal to pi times the square of its radius.. A=(pi)r^2
A sphere with a diameter of 16 meters has the same surface area as the total surface area of a right cylinder with the base diameter equal to the sphere diameter how high is the cylinder?
Surface Area of Sphere = 4*Pi*r2 Surface Area of Cylinder = 2*Pi*r2+2*Pi*r*h If we set them as equal: 4*Pi*r2 = 2*Pi*r2+2*Pi*r*h ' Factor out 2*Pi*r 4*Pi*r2 = 2*Pi*r*(r+h) ' Divide both sides by 2*Pi*r 2*r=r+h ' Subtract r from both sides r=h Diameter = 2*r so h=d/2 In this case, d=16m h=8m
What is the volume of cone?
The volume of a cone is equal to 1/3*(pi)*r^2*h. r=radius pi=3.14 h=height
How do you find the circumference of a circle with just the radius?
The circumference of a circle is equal to the radius times 2*pi. 2*pi*R where R is the radius.
How do you find the radios from the area?
The are of a circle can be expressed by: A = (pi) r^2 So in order to find the radius from the are, you just have to solve this equation for "r". A/(pi) = r^2 (A/(pi))^(1/2) = r Or in words: The radius is equal to the square root of the quantity: area divided by pi.
