C = circumference
r = radius
The circumference of a circle:
C = 2 r π
In this case:
r = 2 x cm
C = 2 r π = 2 • 2 x • π
C = 4 x π = 4 x • 3.1415926535
C = 12.5663705412 x cm
The circumference
of a circle of radius 2x cm is
2 answers
C=2#r
where # is pie=22/7
C=2×22/7×2x×2x
=2×22/7×4x^2
=44/7×4x^2
=176x^2/7
=25 1/7x^2 cm^2
where # is pie=22/7
C=2×22/7×2x×2x
=2×22/7×4x^2
=44/7×4x^2
=176x^2/7
=25 1/7x^2 cm^2
1 answer