Question

Find the circumference of a circle whose radius is 15.4cm

Answer 1

π = 3,14

c = 2.π.r
c = 2.3,14.15,4
c ≈ 96,7

Answer 2

`r=15,4\ cm\\C=2\cdot\ \pi\ \cdot\ r\\C=2\cdot\ \pi\ \cdot\ 15,4\ cm\\C=30,8\ \pi\ cm`


`\pi\approx\ 3,14`


`C=30,8\ \cdot\ 3,14\ cm\\C=96,712\ cm`