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7#

楼主 |
发表于 2009-3-27 12:01:00
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只看该作者
did not do well on math
stuck on the second question for 7 minutes
the question is one side of a triangle is X
and X is 6<=X<=8
which of the following could be the perimeter of the triangle
1. 7 2. 10 3. 15
1 could not be because either the sum of the other two sides is <0 or the sum of the other two sides is less than the X
2 could not be, X=6, the sum of the other two sides is 4, 4<6 X=8, the sum of the other two sides is 2, 2<6
3 could be, X=6, the sum of the other two side is 9, 9>6
so 15 could be the perimeter of the triangle
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