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VP
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Points A, B, and C form a triangle. Is angle ABC > 90 [#permalink]
 24 Feb 2008, 12:44
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Points A, B, and C form a triangle. Is angle ABC > 90 degrees?
1. AC = AB + BC - 0.001
2. AC = AB
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CEO
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marcodonzelli wrote: Points A, B, and C form a triangle. Is angle ABC > 90 degrees?
1. AC = AB + BC - 0.001
2. AC = AB B. in 2, abc cannot be > 90. in 1, it can or cannot be.
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CEO
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Ba good one (+1) 1. AC = AB + BC - 0.001 : angle ABC is (0,180). insufficient 2. AC = AB : angle ABC is (0,90). sufficient
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Director
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Walker, If AC = AB : angle ABC is (0,90). sufficient How? Please explain. regards, Pras
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CEO
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prasannar wrote: Walker,
If AC = AB : angle ABC is (0,90). sufficient How?
Please explain.
regards,
Pras Is angle ABC > 90 degrees? No, because the angle is less 90. Therefore, information is sufficient to answer the question. Hope this help 
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marcodonzelli wrote: Points A, B, and C form a triangle. Is angle ABC > 90 degrees?
1. AC = AB + BC - 0.001
2. AC = AB Just draw out the triangle. S1: No help here. S2: Ul see that Angle ABC is equal to one of the other angles. We cannot have ABC >90* no matter what we do to the other angles b/c its equal to one of the other angles. B
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