Learn how to calculate the perimeter of a sector by adding the arc length and the two radii. See examples, worksheets and related lessons on circles, sectors and arcs. Asectoris a part of the circlePerimeter of sector will be the distance around itThus,Perimeter of sector = 𝜃r + 2r= r(𝜃 + 2)Where 𝜃 is in radiansIf angle is in degrees,𝜃 = Angle × π/(180°)Let us take some examples:Find perimeter of sector whose radius is 2 cm and angle is of 90°First,We need to conv Perimeter of a sector The perimeter is the distance all around the outside of a shape. We can find the perimeter of a sector using what we know about finding the length of an arc. The perimeter of the sector of a circle is the length of two radii along with the arc that makes the sector. In the following diagram, a sector is shown in yellow colour.
