Answer:
4
Step-by-step explanation:
Step-by-step explanation:
to calculate circumference:

if the diameter is 16 then the radius would be 8.

to calculate the area of a circle:

First what you need to do is 4.2 x 0.6 and that will be you answer.
Answer:
I'm pretty sure it would be base x height divided by 2 so 20×6÷2