Respuesta :
Answer:
The formula is [tex]A=\pi r^{2}[/tex].
Find the radius and you can always find the area.
Remember! radius is half of diameter!
Step-by-step explanation:
For example:
Lets say that the diameter is 4. Half of 4 is 2. Therefore the radius is two!
Using the formula [tex]A=\pi r^{2}[/tex],
[tex]A ≈ 12.57[/tex]
Hope this helps!
