Question

If the diameter of my circle is 2 cm what is the circumference in cm only type numbers rounded to the nearest hundredreth

Answer 1

6.28 cm

Explanation:

c = 2π·r = d·π

c = 2cm·3.14 = 6.28 cm

Answer 2

The number
`\pi` is defined exactly as the ratio betweent the circumference and the diameter. We deduce that

`\pi=(C)/(d)\iff C=\pi d`

So, your cimference is
`2\pi`. You can use the approximation
`\pi=3.14` to round to the nearest hundredreth:
`2\pi\approx 6.28`