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Mathematics 13 Online
OpenStudy (anonymous):

how to calculate the circumference of a circle with a radius 30in, in terms of pi? I think it is 60. Am i right?

OpenStudy (cwrw238):

60 pi

OpenStudy (anonymous):

thankyou. Can you help me with another?

OpenStudy (anonymous):

35. What is the area of the figure to the nearest tenth? 8.6 in.2 51.8 in.2 103.6 in.2 16.5 in.2

OpenStudy (cwrw238):

the area of a circle is pi r^2 here we have r = 6 and we have 165/360 of a circle so what do you think the formula for the area is?

OpenStudy (anonymous):

isnt it something like 3.14*r^2?

OpenStudy (anonymous):

im thinking it is 51.8

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