Question

what is the approxiate circumference of the circle shown below?

a. 56.8 cm
b. 61.2 cm
c. 30.6 cm
d. 122.4 cm

need help :p

Answer 1

\[s=\pi r^2 \]
do you mean diameter=19.5 or radius =19.5 ?

Answer 2

\(\bf circumference=2\pi r\)

Answer 3

oh sorry
i type area instead of circumfrence !

Answer 4

oh what the approximate area of the circle i mean

Answer 5

if radius =19.5
so 2pi r= 2(19.5) 83.14 =122.52

else if 2r=19.5
so 2pi r=pi (2r)=19.5 *3.14 =61.26