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One fourth of a circle is called a?
It should be called the fourth of a circle. Numerically, it's (2pi x r)/4 for the perimeter. and (pi x r squared) / 4 for the area.
What is the diameter of a circle times pie?
Here are the three circle equations, in words and equations. Circumfwerence - pi X diameter C = pi d Circumference = two X pi X radius C = 2pi r Area = pi X radius squared A = pi r^(2) NB It is only the radial value that is squared ; NOT 'pi'. NB pi is a constant at 3.141592..., usually approximated to 3.14 or 3.1416.
What is the diameter if the circumference is 8 cm?
C = 2(pi)r 8cm=2(pi)r (8cm)/2pi = r d=2r d=8cm/pi
What is pi r r?
Pi times r times r or Pi r squared is the formula for finding the area of a circle where r is the radius
Pi r squared?
volume of a circle
What is the area of a circle with a circumference of 410 meters?
Circumference = 2pi*r 410 = 2pi*r r = 205/pi A = pi*r^2 A = pi*(205/pi)^2 A = 205^2/pi metres A = 42 025/pi metres
What is the circumference of a circle when the area is 36 pi?
To convert area into circumference, take the two formulas for circles--circumference and area: C=2pi*r A=pi*r^2 Now, isolate the common variable (r) in the second equation. r=sqrt(A/pi) Now you can substitute this in for "r" in the first equation to find circumference C=2pi*sqrt(A/pi) C=2pi*sqrt(36pi/pi) pi cancels out C=2pi*sqrt(36) C=2pi*6 C=12pi
What is the radius if the circumference is 16 feet?
Circumference = 2*pi*raduis 16 = 2*pi*r divide both sides by 2pi 16/2pi = r 8/pi = radius
One fourth of a circle is called a?
It should be called the fourth of a circle. Numerically, it's (2pi x r)/4 for the perimeter. and (pi x r squared) / 4 for the area.
What is the radius of the circle if the circumference of the circle is 13 pi cm?
C = 2 pi r (divide by 2pi to both sides) C/2pi = r (substitute 13 pi cm for C) r = (13 pi cm)/(2 pi) = (13/2)(pi/pi) cm = 6.5 cm
What is the diameter of a circle times pie?
Here are the three circle equations, in words and equations. Circumfwerence - pi X diameter C = pi d Circumference = two X pi X radius C = 2pi r Area = pi X radius squared A = pi r^(2) NB It is only the radial value that is squared ; NOT 'pi'. NB pi is a constant at 3.141592..., usually approximated to 3.14 or 3.1416.
If the circumference is 3.2 then what is the radius?
C=2(pi)(r) 3.2=2(pi)(r) 3.2/(2pi)=rr~0.5093
What is the diameter if the circumference is 8 cm?
C = 2(pi)r 8cm=2(pi)r (8cm)/2pi = r d=2r d=8cm/pi
What is 2 pie r sqaured?
Pi r squared is the formula for the area of a circle. 2 pi r squared is twice that.
How do you find the are of the base of a cylinder?
SA=2(pi times r squared) + h(pi 2 r) or (easier way) 2 pi r squared + 2 pi r h
How do you find ratio of area to circumference using pi?
Area = pi R2Circumference = 2 pi RArea/Circumference = pi R2/2pi R = 1/2 R
What is a formula for calculating the radius of a circle when the circumference is known?
The way to find the circumference is either 2 x pi x r, or pi x d.So rearrange the formula:circumference = 2 x pi x rcircumference / 2 x pi = rSo take the circumference, and divide it by 2 pi and you have the radius.A:Using the formula for circumference which is 2(pi)r solve for r. Now you have radius = circumference/(2pi). The formula for area of a circle is (pi)r^2. Substituting r with circumference/(2pi) you get area = pi(circumference/(2pi))^2. When you simplify you get area = circumference^2/(4pi).
