Question

What is the area of a circle if its circumference is 20π?

Answer 1

Circumference = 2 pi r = 20 pi
find r from here
then area = pi*r*r

Answer 2

@hartnn im confuse whats pi

Answer 3

pi is an irrational number (approximately 3.14 or 22/7) denoted by \(\huge \pi\)

Answer 4

oh ok because i got 3.14*2=6.28

Answer 5

why multiply by 2??

Answer 6

20pi = 2pi(r)
r = 20pi / 2pi
r = 10 units
A = pi(10^2)
A = 100pi units^2

Answer 7

@janett77

Answer 8

@hartnn wait idk do i have to multiply it by 2o

Answer 9

i would first like u to solve for r in
2 pi r = 20 pi

Answer 10

r=10

Answer 11

good, now area = pi*r*r= ??

Answer 12

3.14*10

Answer 13

is that good so far

Answer 14

nopes its 3.14*10*10= 314 approximately.