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Example:
What is the circumference of a circle having a diameter of 7.9 cm, to the nearest tenth of a cm? Using an approximation of 3.14159 for , and the fact that the circumference of a circle is times the diameter of the circle, the circumference of the circle is Pi × 7.9 3.14159 × 7.9 = 24.81…cm, which equals 24.8 cm when rounded to the nearest tenth of a cm.
or you could just measure it using a string and save yourself the math
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What is the perimeter of a 6.2 radius circle?
There is no such thing as the perimeter of a circle. The circumference, however, is 12.4*pi (since the formula is pi*diameter)
What is a perimeter formula?
There are many formulas for perimeter depending on what shape you are trying to find the perimeter of. The perimeter is the distance around a shape, so one formula to find perimeter is simply adding all the side lengths together.
How do you find the diameter of a circle with the perimeter?
The equivalent of a "perimeter" in a circle is actually called its circumference. To get the diameter, just divide the circumference by pi.
How do you find the perimeter of a rectangle with a semi circle attached to it?
add the perimeter of the rectangle, minus the side that'c covered by the semi circle. then, find the circumference of the semi circle [diameter x pi, divided by 2] and addd them together
What is the formula for the perimeter of a circle?
2 x pi x r where pi = 3.1416orpi x diameter.To find the perimeter you do pi (3.1415) times the diameter.Or you can figure by the radius (P=2 π r; i.e. Perimeter = 2 x 3.1415 x radius)The perimeter of a circle is its circumference. We use these formulas to find the circumference of a circle;C=d times pi orC=2 times the radius times pi (3.14).To make it easier to explain:Area: Pi (3.14) X Radius Squared (r 2) from the center out of the circlePerimeter: Pi (3.14) X Diameter (d) from one side of the circle to the otherThe perimeter of a circle is called Circumference.Here is the formula for Circumference:C= pi x d (pi times diameter)C= 3.14 x ______ (fill in the blank with the diameter of the circle)C= (your answer)NOTE: Pi is approximately 3.14 so when you are using pi to multiply, replace it with 3.14When the diameter is not given in a circle, double the radius to find the length of the diameter.
What is the formula of a perimeter of a circle?
to find the perimeter of a circle you simply do this (pi x D )
How do you find perimeter of half circle?
The formula for the perimeter of a whole circle is 2 π r therefore the perimeter of a half circle will be (2 π r)/2 which is π r n.b. the perimeter of a circle is normally referred to as the circumference...
What is formula of perimeter of semi circle?
The perimeter of a circle has the formula 2πr. Therefore the length of a semi circle is πr. But the perimeter of a semi circle also includes the diameter which is 2r. Therefore the perimeter of a semi circle = πr + 2r = r(π + 2)
How do you find the perimeter of the circle of radius r?
by using formula 2. pie. r
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 the sector of the circle?
There is no specific formula for a sector of a circle. There is a formula for its angle (at the centre), its perimeter, its area.
How do you work out perimeter of circle?
To find the circumference (distance around) of a circle, use the formula pi x d (d=diameter)
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 perimeter is shape is a circle?
The perimeter is equal to Pi times the diameter.
What is the formula for equillateral triangle?
There are different formula for: Height, Area, Perimeter, Angle, Length of Median Radius of inscribed circle Perimeter of inscribed circle Area of inscribed circle etc.
What is the formula for circle segment?
The answer will depend on what the formula is for: the perimeter or area of the segment.
What is the formula for perimeter to find the radius?
The perimeter of a circle is better known as the circumference.C = 2*pi*r so that r = C/(2*pi)
