(n/360)*2*3.14*9=27.42-2*9
n=[(27.42-18)*360]/(2*3.14*9)=60°
扇形的半径为9分米,周长为27.42分米,则扇形的圆心角为?
扇形的半径为9分米,周长为27.42分米,则扇形的圆心角为?
数学人气:682 ℃时间:2020-01-12 15:38:31
优质解答
我来回答
类似推荐
猜你喜欢
- 1有5箱苹果,每箱拿出15千克.所剩的重量刚好等于原来两箱的重量,原来每箱苹果重多少?
- 2今年爸爸43岁,三个儿子分别是14、11、6岁._年后,爸爸的年龄恰好等于三个儿子年龄之和.
- 3六年级简便运算:222×999+666×667 999×999+1999
- 4某工作,甲做5小时乙做6小时可完成;甲做7小时乙做2小时可完成.如果甲做3小时后乙接着做还需几小时完成?
- 5某校一年级有学生120人,今天有1人请假,今天一年级的出勤率是_%.
- 6关于奥运的英语诗歌,要长的.
- 7we'll/at fiive/be meeting/him/tomorrow/at the airport 排句
- 813.9减去3.78除以5再除以0.378如何进行简便运算?
- 9we have received so many letters for our friends' column,
- 10Many a man and woman wishes that he or she had had a better education when they were young