Question

What is the diameter of the circle that has a circumference of 15cm?

Answer 1

`"diameter "~~4.78" cm to 2 dec. places"`

Explanation:

`"using the formula for circumference (C)"`

`•color(white)(x)C=pidlarrcolor(blue)"d is the diameter"`

`rArrd=C/pi=15/pi~~7.78" cm"`

Answer 2

about 4,78

Explanation:

the equation for circumference is:
`D*pi=C`
(D=diameter, C=circumference)
To get the diameter we need to invert the equation:
`C/pi=D`
If we put in all the numbers now we get that:
`15/3,14=4,777070...`