Sagot :
If you think on circumference of a circle.
C = d * pi
pi = 22 / 7
C = d * pi
C = 2.1 * ( 22 / 7 ) = 2.1 * 22 / 7 = 46.2 / 7 = 6.6
C = d * pi
pi = 22 / 7
C = d * pi
C = 2.1 * ( 22 / 7 ) = 2.1 * 22 / 7 = 46.2 / 7 = 6.6