6.28
It is also the angle in radians equivalent to an angle of 360 degrees.
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C= 2 times pi and C= pi times diameter C= 2 times pi and C= pi times diameter
pi^2
2 x pi x 2 = 4 x pi
It is 2*pi/3.
NO!!!! C = 2 pi r C = pi d In words ; Circumference equals two times 'pi' times radius or , circumference equals 'pi' times diameter. NB The diameter is twice the radius. Also A = pi r^(2) In words, Area equals 'pi' times the radius squared. Read learn and comit to memory these two circle equations.