10 years ago..."If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, find the ratio of their radii." Crystal sighed and looked at the person who was sitting in front of her.She is bored already, but he looked so energetic. He must be crazy, how can he love maths? She doesn't think even who invented maths, didn't love maths.Rayan took a glance at Crystal who looked helpless and laughed softly. He took the notebook from her and drew two circles on it. "Let the radii of the two circles be r1 and r2." He paused and looked at Crystal, she was staring at the circled and listening to him attentively.A smile curved his lips. "Let an arc of length l subtend an angle of 60° at the centre of the circle of radius r3... Then let...." He continued.Crystal's lips parted when he finished. "It's so easy." She smiled heartily. "You're just wow." They were in a classroom. Rayan tol
Last Updated : 2020-09-17 Read more