Basic Math Examples

Find the Area circle (4)
r=4
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=4 into the formula for the area of a circle. Pi π is approximately equal to 3.14.
π42
Step 3
Raise 4 to the power of 2.
π16
Step 4
Move 16 to the left of π.
16π
Step 5
The result can be shown in multiple forms.
Exact Form:
16π
Decimal Form:
50.26548245
 [x2  12  π  xdx ]