Using the formula:

Which is, 3.14 x 2^2 (radius is half of diameter)
Which equals 12.56.
Answer:
I dont know the context of the situation, or what happened, but don't listen to the rude comments that people say about your appearance/how you look.
Doesn't matter what color your skin, hair, eyes, body type, height, or anything is. What matters most if that you love yourself and your body!
Explanation:
- Eijiro <3