Question

Find the diameter of a circle with a circumference of 28.26 centimeters .​

Answer 1

9cm

Explanation: we have found that the radius is 2.999239 and the formula for circumference of a circle is:

π

⋅

d

2.999239

⋅

2

=

5.99848

(multiply by 2 to get the diameter)

5.99848

⋅

π

=

18.84478

Answer 2

9cm

Explanation:

since diameter is twice of the radius of circle so you need radius to solve this.

as circumference is given here and the formula for calculating circumference of circle is c=2
`\pi`r so for radius it can be write as r=c/2
`\pi`. putting value of c and
`\pi` we get radius.

r=c/2
`\pi` = 28.26/2*3.147 = 4.5cm. now diameter is twice the radius i.e. 4.5*2=9cm.