弦长相等则弧长相等如何证明 有图说明更好呀 拜托了``````````````````````````````````````````````````````````````````````````` 证明证明证明证明证明证明证明

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弦长相等则弧长相等如何证明 有图说明更好呀 拜托了``````````````````````````````````````````````````````````````````````````` 证明证明证明证明证明证明证明
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弦长相等则弧长相等如何证明 有图说明更好呀 拜托了``````````````````````````````````````````````````````````````````````````` 证明证明证明证明证明证明证明
弦长相等则弧长相等
如何证明 有图说明更好呀
拜托了```````````````````````````````````````````````````````````````````````````
证明证明证明证明证明证明证明

弦长相等则弧长相等如何证明 有图说明更好呀 拜托了``````````````````````````````````````````````````````````````````````````` 证明证明证明证明证明证明证明
错的,因为你如果把一个圆分成不规则的两份的话,弦不过圆心,同一条弦所对的弧长是不相等的,除非是过圆心的直径.因此,
在同一个圆内:
(1)弧长相等则弦长相等.
(2)弦长相等但弧长不一定相等.

弦长相等则弧长相等
这个结论的前提是在同一个圆内,或在两个等圆内。
因为在等圆或同圆中,等弦所对的圆心角相等,而两个圆心角相等时,它们所对的弧也相等。

如果在同一个圆内,则根据等边三角形全等的条件,两条半径加一条弦都相等,则三角形全等,那么弧对应的那个圆心角相同,弧长等于半径乘以圆心角的弧度,自然也相等
如果不在同一个圆内,如果半径不同,那么这个命题不成立