Perimeter of quadrant of a circle

Best Answer: the circumference of a circle is 2πr (where r = radius)

The arc length of a quadrant of a circle is a quarter of the circumference, i. e. πr/2.

There are also the lengths of the 2 straight sides of the quadrant, and their lengths are both r. so the Perimeter of a quadrant = 2r + (πr/2)