标题:
[求助] 一条件充分性题
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作者:
crossmoon
时间:
2004-3-18 10:33
标题:
[求助] 一条件充分性题
一三角形内接一圆,三角形一边长为6,问此三角形是否为正三角形.
(1) 此三角形两边相等.
(2) 此圆周长为 6 pai
机经答案为E,我觉得是B.由直径是6,推出不可能是正三角形.
对吗?
[此贴子已经被作者于2004-3-18 10:34:29编辑过]
作者:
Bond007
时间:
2004-3-18 11:16
B, no doubt
作者:
dancingforum
时间:
2004-3-19 00:28
I think it is B too.
Assume it is an equilateral triangle, the length of its
side should be sqrt(27),given the circumference of
the circle as 6pai.
more opinions on this question needed please
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