$\"\"$

The Area A of a circle is given by the formula, $\"\"$ .

Where r is the radius of the circle.

$\"\"$ $\"\"$

The Area A of circle is, $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Evalute power: $\"\"$ )

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

The Area A of a circle is $\"\"$ .