If you rounded to the nearest whole number, yes, the number that you'd get would be 9 but if you were to look at the two values, 7.8 and 9, then no, these two are not equivalent due to the fact that 9 is 1.2 values higher than 7.8
1 : the perimeter of a circle The circle measures 22 inches in circumference. 2 : the external boundary or surface of a figure or object : periphery from the center to the circumference of the sphere.
