Angle made by circumference at the center of circle. From this point on we are going to use the following formula for the length of the curve. You know that th 120 since it is given that angle KPL equals 120 degrees.
Again when working with p if we want an exact answer we use p.
In computer programming languages the inverse trigonometric functions are usually called by the abbreviated forms asin acos atan. As circumference C 2pr L th 2pr 2p L th r. 2 p r. A th360pr 2 when th is measured in degrees.