Respuesta :

kamelia

Answer:

For the first:

R:half of the diameter:2

D:4

C:diameter×pi

[tex]\pi \ \: diameter[/tex]

4×3.14=12.56

A:

[tex]\pi \: {r}^{2} [/tex]

3.14×4=12.56

The amswers are same.

willik0294

Answer:

what math is this?

Step-by-step explanation: