$\"\"$

Center of a circle is $\"\"$ .

Point on the circle is $\"\"$ .

Let $\"\"$ and $\"\"$ .

The distance from the center of the circle to the point on the circle is equal to the radius of the circle.

The radius of the circle is $\"\"$ .

$\"\"$

The circumference of the circle is $\"\"$ or $\"\"$ .

$\"\"$

The circumference of the circle is $\"\"$ .

Option K is the correct choice.

$\"\"$

Option K is the correct choice.