Is it possible to prove a triangle ABC is isosceles, given only that Ậ = 50º

???????

thanks

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- March 16th 2006, 12:08 AM #1

- March 16th 2006, 03:45 AM #2

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Originally Posted by**jacs**

constraint on a general triangle is that the angle sum is 180 degrees.

So a triangle with an angle of 50 degrees could have its other angles as

60 and 70 degrees and hence need not be isosceles.

RonL

- March 16th 2006, 03:50 AM #3
thanks for that, that is pretty much what i thought too, but teacher insists it can be done.

Should get his working tomorrow, which will prove interesting. I guess he must know some alternate universe geometry that we don't.

Or perhaps he just gave us the wrong info, (wouldnt be the first time)

lol

i will post his answer for a laugh, see what he manages to come up with

thanks CaptainBlack

- March 16th 2006, 05:40 AM #4

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- March 16th 2006, 07:19 AM #5

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- March 16th 2006, 01:39 PM #6

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- March 16th 2006, 01:53 PM #7

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- March 18th 2006, 03:55 AM #8