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landmark Inner circle within a triangle 5194 Posts |
From a colleague, an old one but still very good. No fair looking up the answer. I haven't solved it yet. You may only use basic geometry and algebra. No trig functions allowed. Find the value of angle x.
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Nir Dahan Inner circle Munich, Germany 1390 Posts |
I know this one and it is very hard if you don't use the sine theorem.
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Jonathan Townsend Eternal Order Ossining, NY 27297 Posts |
? are we allowed to take as given that:
1) the lines are straight 2) there that the sum in degrees of the interior angles in a triangle is 180? 3) lines shown to intersect do intersect?
...to all the coins I've dropped here
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landmark Inner circle within a triangle 5194 Posts |
Yes on all three. Assume Euclidean geometry.
Click here to get Gerald Deutsch's Perverse Magic: The First Sixteen Years
All proceeds to Open Heart Magic charity. |
Bartelli Elite user Belgium 403 Posts |
Is it okay to post the answer? I think I got it...
oops, no I don't, sorry
Mentalist / Mindreader Bart Nijs
www.bartnijs.be Belgian Mentalist / Mindreader Bart Nijs Some webapps for mentalists |
thepspdope Regular user With Roughly About 173 Posts |
Aaaaaaaarrrrrrgggghhhhhhh
This one is driving me crazy! I know all the other angles off by heart I've tried this so much lately
- just because you're paranoid, doesn't mean they're not after you!
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Nir Dahan Inner circle Munich, Germany 1390 Posts |
Sometimes it helps adding lines...
ND |
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