Question

Calculate the length of the circumference of a circle with radius of 2.8cm

Answer 1

The equation for circumference is c= (2)pi(r)
If you fill it out, it becomes c = (2)pi(2.8)
Multiply to solve.
Circumference: 17.59cm rounded to nearest hundredth.

*Never use 3.14 as pie, always solve on calculator. 3.14 itself is not pi!!

Answer 2

- - Solve:



`2*r*p`

R=Radius
P=Pi (Approximate (≈) 3.14, or
`(22)/(7)`)

Okay so it tells us our radius: 2.8cm and we know out pi: 3.14 so now we plug in:

`2*2.8*3.14`
=17.593

Final answer: 17.593 (If needed, you can round this to 17.6)