since the equation to get circumference is diamiter X pi, and the diamiter is 2x the radius, yes it would double the C of the circle
ie
before
radius is 2, so diamiter is 4
4 X Pi 12.57...
radius is 4 so the diamiter is 8
8 X pi = 25.13...
that would double it.
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since C=2Pixr, if we double r, we need to double C also. 2C=2Pix 2r
Clarity please!!!! 'Circumference of what??? Also what does the 8 cm represent . diameter, radius, diagonal etc., !!!!
We know that the radius is half of the diameter, and also that a circle's diameter multiplied by pi is the circumference, so we multiply 12 by 2 to get 24, then we multiply this by pi, so we can either express this as 24π units, or we can assume pi to be 3.1415926 and multiply this by 24 to get 75.3982224 units.
circumference equal two times 'pi' times radius. It is written algebraically as C = 2pir Since 2r = d (diameter) Then C = pi*d Also the area (A) of a circle is A = pi*r^(2) 'pi' is the constant of proportion of circles. NB For school work pi = 3.14 or pi = 3.1416 or pi = 22/7
When the diameter of the circle doubled, its circumference also doubled.However, its area increased to 4 times the original area, while nobody was looking.