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D=7.9cm. what is the circumference and area of the circle?
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D=7.9cm. what is the circumference and area of the circle?
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Oct 17, 2016
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D=7.9cm. what is the circumference and area of the circle?
Mathematics
middle-school
Steve Klabnik
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Steve Klabnik
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You multiply 7.9 by pi to get an answer of 24.8 cm for the curcumference, and then square the raduis, 3.95, to get 15.6025, and then multiply that by pi to get 48.9 cm squared for the area. (I used 3.14 for pi and rounded to the first decimal place)
SilenceCodder
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Oct 18, 2016
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circumfrence: pi times diameter
7.9*
circumfrence is approximatley 24.806
area:
a=
*(1/2(d))^2
a= 48.99
ErnieAndBert
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Oct 22, 2016
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ErnieAndBert
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