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1. The radius of a circle is half of its diameter.
2. The radius can also be calculated from its circumference (C).
Method: Divide the circumference by Pi, this will give you the diameter. Then divide the diameter by 2 to get the radius (r).
Formula: r = C/2Ï€
3. The radius can also be calculated from the area of the circle. Area = π x r2
So, divide area by Pi, then the radius will be the square root of the answer.
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Why do you use the radius in the formula of finding the area of a circle?
Area of circle = pi*(radius)2
What is the formula for finding perimeter of a circle?
The formula for the circumference of a circle is pi * diameter or (2 radius.)
What is the formula for finding the radius of a circle when you have the perimeter?
2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi
What formula is pi d?
It is the formula for finding the circumference of a circle which is the same as 2*pi*radius
What is the formula for finding the diameter of a circle?
two times the radius (d=2r)
Why do you use the radius in the formula of finding the area of a circle?
Area of circle = pi*(radius)2
What is the formula for finding perimeter of a circle?
The formula for the circumference of a circle is pi * diameter or (2 radius.)
What is the formula for finding the radius of a circle when you have the perimeter?
2*pi*radius = perimeter or circumference of a circle radius = circumference/2*pi
What is Pi R Squared?
The formula for the area of a circle is πr^2, where π (pi) is a mathematical constant approximately equal to 3.14159, and r is the radius of the circle. So, "pi r squared" refers to the area of a circle, calculated by multiplying π by the square of the radius. This formula is fundamental in geometry and mathematics for finding the area enclosed by a circle.
What is the formula for finding an area of a circle?
The area of a circle with a known radius can calculated using the following formula where r is the radius : A = Pi(r)2
What is the formula of finding the radius of a rectangle?
Hell are you talking about?!? A radius is a dimension of a circle! A rectangle has no stinking radius!
What is formula ofr finding area of a circle?
Area of a circle = pi*radius squared
Formula for finding the area if you have radius?
Area of a circle = pi*radius2
How do you Find The Perimeter of a Circle With Radius?
this is called finding the circumference. The formula is 2*pie*radius
What is the formula of finding the area of a circle?
Pi * R squared, where R is the radius of the circle in question
What formula is pi d?
It is the formula for finding the circumference of a circle which is the same as 2*pi*radius
What is the formula for finding the centroid of a circle?
2[4(radius)/3(pi)]
