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一道有关线段数量的七年级数学题
直线l上任取2个点最多有 ___条线段，任取3个点最多 ___条线段，任取n个点有 ___条线段．
七年级数学题讲解5/13
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App07:35打开App观看
直线l上任取2个点最多有 ___条线段，任取3个点最多 ___条线段，任取n个点有 ___条线段．
App07:37App08:43App02:19App04:40App06:43App06:55App05:54App04:44App03:35App09:01App03:23App03:37App07:35
