Q. the circle has center O, and the measure of angle ROS is 72 degrees. The length of minor RS is what fraction of the circumference of the circle
Identify Relationship: Identify the relationship between the central angle and the arc length.The length of an arc is proportional to the angle it subtends at the center of the circle. The formula to find the arc length L is L=(θ/360)×C, where θ is the central angle in degrees and C is the circumference of the circle.
Calculate Fraction: Calculate the fraction of the circumference that the arc length represents.Since the measure of angle ROS is 72 degrees, the length of minor arc RS is (72/360) of the circumference of the circle.
Simplify Fraction: Simplify the fraction. (72/360) simplifies to (1/5) when both the numerator and denominator are divided by 72.
State Final Answer: State the final answer.The length of minor arc RS is 51 of the circumference of the circle.