Answer:
[tex]A = 12.56 cm^{2}[/tex]
Step-by-step explanation:
When you want to find area out of diameter. These are the steps you follow:
1. Convert diameter to radius
2. Solve for area
First step:
When you need to convert diameter to radius, you just need to divide by 2
[tex]d = 4cm / 2cm[/tex]
[tex]==> 2cm[/tex]
Second step:
Use formula [tex]A = \pi * r^{2}[/tex]
A = [tex]\pi * 2cm^2[/tex]
A = [tex]\pi * 4cm[/tex]
A= [tex]12.56cm[/tex]
