Why radian measure is used to find arclength? Trigonometry Graphing Trigonometric Functions Applications of Radian Measure 1 Answer Nghi N. Jun 16, 2015 Radian is used to measure arc length Explanation: pi is a constant that is used to measure circumference. Example: 2piR Answer link Related questions What are some applications of using radian measure? How do you calculate the length of an arc and the area of a sector? How do you approximate the length of a chord given the central angle and radius? What are some example problems involving angular speed? How do you find the length of the chord of a circle with radius 8 cm and a central angle of 110^@? How does sinx=0 equals π? How do you write the function in terms of the cofunction of a complementary angle tan(pi/5)? What is the value of sin(pi/4)? What is the value of tan(pi/3)? What is the value of cos(7pi/4)? See all questions in Applications of Radian Measure Impact of this question 2152 views around the world You can reuse this answer Creative Commons License