The perimeter of a circle is known as its circumference. 236 10 displaystyle 236 10 236 displaystyle 236 So the length of an arc of a circle with a radius of 10 cm having a central angle of 236 radians is about 236 cm. An arc can be measured in degrees but it can also be measured in units of length.
An arc measure is an angle the arc makes at the center of a circle whereas the arc length is the span along the arc.
So we need to find the fraction of the circle made by the central angle we know then find the circumference of the total circle made by the radius we know. Calculate the perimeter of a semicircle of radius 1. Arc Lengths - This computes the length of a cord segment arc length on a circle given the radius r and angle TH Circle within a Triangle - This computes the radius of a circle inscribed within a triangle given the length of the three sides abc of the triangle. What is the radius.