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No. 2Pi r is equal to Pi d, though.
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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 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
How do you find the circumference of a circle as a function of its area?
Take the formulas for the area and circumference of a circle, and massage them.R = radius = 1/2 of the diameterA = Area of a circle = pi R2 = pi (D/2)2 = pi D2/4C = Circumference of a circle = (pi D) or (2 pi R)C = 2 pi R = 2 (pi R2)/R(R) C = 2 A(C/2pi) C = 2 AC2 / 2pi = 2 AC2 = 4 pi AC = sqrt ( 4 pi A ) or 2 sqrt ( pi A )
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
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
How do you find out the area of a circle?
pi times the radius squared pi r squared
How many square ft are within a 36inch circle?
C = 36 in = 3 ft = 2 pi r so that r = 3/2pi ft A = pi r2 = pi(3/2pi)2 = 9/4pi ft2 ≈ 7.07 ft2
