半径为2的圆中,甲乙丙丁四个扇形的圆心角度数之比为8:5:5:2,求甲乙丙丁四个扇形圆心角的度数
问题描述:
半径为2的圆中,甲乙丙丁四个扇形的圆心角度数之比为8:5:5:2,求甲乙丙丁四个扇形圆心角的度数
答
圆心角度数和半径无关
甲:360/(8+5+5+2)*8=18*8=144
乙:360/(8+5+5+2)*5=18*5=90
丙:360/(8+5+5+2)*5=18*5=90
丁:360/(8+5+5+2)*2=18*2=36