Please help me.

= c

or

= c

Step-by-step explanation:

We know that the diameter of a circle multiplied by is the circumference, so we can create this equation:

180 = c *

Your teacher told us to assume is 22/7, so we'll put that in

180 = c *

To get c by itself, we divide both sides by 22/7

= c

Dividing by a number is the same as multiplying by its reciprocal, so we'll multiply 180 by 7/22

180 * = c

Evaluate

= c

= c

If you want a decimal instead:

= c

step-by-step explanation: