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3-4-5, 5-12-13, 8-15-17 triangles

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ambikasrinivas
 Post subject: 3-4-5, 5-12-13, 8-15-17 triangles
 Post Posted: Fri Jun 10, 2011 1:05 pm 
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Course Students


Posts: 13
If we are told that the sides of a triangle are one of the right triangle ratios (ex: 3-4-5), can we always assume its a right triangle? Or is it possible to have a non-right triagle with those measurements?
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karan13
 Post subject: Re: 3-4-5, 5-12-13, 8-15-17 triangles
 Post Posted: Fri Jun 10, 2011 6:42 pm 
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Students


Posts: 27
hi... a rt triangle measurements such as 3,4,5, have to always include a 90 degree ... firstly cos of pythagorous theorem which is perpedicular sq. + base sq.= hypotenuese sq.

also this can be proven by trignometry... in short the answer is YES.
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jnelson0612
 Post subject: Re: 3-4-5, 5-12-13, 8-15-17 triangles
 Post Posted: Sun Jun 12, 2011 10:50 pm 
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ManhattanGMAT Staff


Posts: 2394
Thank you karan; that is correct.

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Jamie Nelson
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