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The radius is a line from the center of the circel to any point on the outside of the circle.

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14y ago

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What is the perimeter of 21 mi of a circle?

The perimeter of a cirlcle is its circumference which is: 2*pi*radius or diameter*pi


What is the formula for circumference of a cirlcle?

d * pi or 2 * r * pi Where d is diameter and r is radius and pi = 3.14159


How many sides in a cirlcle?

1


How many degrees are in a cirlcle?

10


How do you find the area of a cirlcle?

The area of a circle is given by the formula A=pi x r2 Where A is the area of the circle, pi is a constant approximately equal to 3.1415, and r is the radius of the circle. So, to find the area of a circle with a radius of 5cm you would first square the radius -- 25 cm2. Then times by pi. So the answer would be 25pi cm2.


How is is surface area helpful?

it is helpful to determining a cirlcle


How many vertices does a cirlcle have?

A circle has no vertices around it


Who was in the inner cirlcle of Jesus' diciples?

Peter, James, & John


What is the diameter of a cirlcle with a circumference of 18.84956?

The diameter is 6 units.


Is diameter the measurement across a circle or the measurement around a cirlcle?

"Diameter" is the distance all the way across the circle, through the center."Radius" is 1/2 of the diameter ... the distance from the center to the curvy part of the circle."Circumference" is the distance all the way aroundthe circle.


What is the meadin?

the meadin is when you line up the numbers least to greatest and cirlcle the middle number


What does a star or dot in a cirlcle usually mean on a map?

Usually it is the capital of that city or state.