p. 1

how to find the slope of a line how to find the slope of a line in mathematics we deal with the round shape objects that are called the circle and circle has so many properties or terms that specify more the circle such as radius chord diameter secant and many more circumference is one of them the definition of the circumference is the perimeter of a circle is called circumference the circumference s formula of a circle is given by the formula circumference c 2 r in above formula `r is the radius of the circle and is a constant value and is equal to 22 7 and to be more precise 3.142 we can also calculate the circumference of a circle by using its diameter and the formula for that is circumference c d in above example the value of is a same as above and `d is the diameter of the circle we can simplify the value in 3.14 know more about math equation solver math.tutorvista.com page no 1/4

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p. 2

so that our calculations become easy to understand below are some examples that shows how to find circumference of a circleexample 1 determine the circumference of a circle when we have the radius 20 solution it is to be noted that circumference should be multiplied by 2 that is the length of the radius formula circumference of circle 2 r 2 20 125.6 example 2 determine the circumference of a circle and we have area of the circle equals to 200.96 solution this solution can be easily understood by the steps step 1 find the radius of the circle r2 200.96 r2 200.96 3.14 r2 64 r 8 step 2 now we will calculate the circumference of circle circumference of circle 2 r 2 8 50.24 so the circumference of the circle is 50.24 example 3 determine the circumference of a circle when we have given its radius is 22 solution it is to be noted that circumference should be multiplied by 2 that is the length of the radius circumference of circle 2 r circumference 2 22 138.16 example 4 determine the circumference of a circle when we have know the area of the circle that is 254.34 solution this solution can be easily understood by the steps step 1 find the radius of the circle r2 254.34 r2 254.34 3.14 r2 81 r 9 learn more multiplying polynomials math.tutorvista.com page no 2/4

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p. 3

step 2 now calculate the circumference of the circle circumference of circle 2 r 2 9 56.52 so the circumference of the circle is 56.52 example 5 determine the circumference of a circle when we have the radius is 60 solution it is to be noted that circumference should be multiplied by 2 that is the length of the radius circumference of circle 2 r circumference 2 60 376.8 math.tutorvista.com page no 4/4

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p. 4

thank you for watching presentation

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