Pre-Algebra Examples
r=2
Step 1
The area of a circle is equal to Pi π times the radius r squared.
π⋅(radius)2
Step 2
Substitute in the value of the radius r=2 into the formula for the area of a circle. Pi π is approximately equal to 3.14.
π⋅22
Step 3
Raise 2 to the power of 2.
π⋅4
Step 4
Move 4 to the left of π.
4π
Step 5
The result can be shown in multiple forms.
Exact Form:
4π
Decimal Form:
12.56637061…