A circle has a diameter of 20cm.
20cm
Work out the area of the circle.
Use = 3.14

100 cm² or 314.16 cm²

Step-by-step explanation:

First, you should find the radius of the circle, which is half the diameter.

r = 10 cm

The area of the circle = r²

So you just need to plug in and multiply everything.

A = 10²

= 100 cm²

Usually, you can leave it in terms of pi, but otherwise

= 314.16 cm²

the y will be in still but your answer will be y x 3

step-by-step explanation:

jk: )

its c or d   take a lucky guess my dude