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Earn +20 ptsQ: What formula is pi r divided by 2?
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Continue Learning about Geometry
How do you work out the radius?
C=2*pi*r Radius is the circumference of the circle divided by 2pi. Therefore, if the circumference was C then the following formula works out the radius: r=C/(2*pi)
What is the formula for finding the circumference of a semicircle?
2 pi r = circumference. 1/2 of that is pi x r. pi is 3.142
What is formula of perimeter of quadrant?
In a circle of radius, r, perimeter of quadrant = pi*r/2 + 2r = r*(pi/2 + 2)
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 area circumfrance and the diameter of a circle?
Formula for area: A = Pi*R² (Pi = 3,1416 and R² is the radius multiplied by itself) Formula for circumference: C + Pi*D (D is diameter) Formula for Diameter: D = 2*R (radius multiplied by 2))
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