pieguy26
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| 04 Jan 2014 09:37 PM |
how many angles are formed by 15 distinct rays with a common endpoint?
offers on 400 robux |
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9tails327
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| Joined: 02 Jun 2008 |
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| 04 Jan 2014 09:37 PM |
how many angles are formed by 15 distinct rays with a common endpoint?
Pretty sure
7 |
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pieguy26
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pieguy26
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| Joined: 16 Aug 2009 |
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| 04 Jan 2014 09:40 PM |
| srsly guys im in harvard this is important |
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snappy111
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| Joined: 27 Sep 2008 |
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| 04 Jan 2014 09:40 PM |
| ITS 99 CUZ IF IT WAS 12 IT WOULD BE 66 |
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swordron
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9tails327
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| 04 Jan 2014 09:43 PM |
The number of pairs is 12C2 = (12*11)/(1*2) = 66 angles ============================================= Cheers, |
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pieguy26
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| 04 Jan 2014 09:43 PM |
| whats the formula to figure it out |
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pieguy26
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| 04 Jan 2014 09:43 PM |
@ tails (yahoo answers) thats for 12 angles
dont blindly copy and paste |
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Powmonkey
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Smooks12
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| 04 Jan 2014 09:47 PM |
| 30. Interior and exterior. If not 30, then its 29, 28, or 27. Maybe 31 or 32. |
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glaring
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| 04 Jan 2014 09:47 PM |
| LOLD @TAILS COPY PASTE FAIL |
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| 04 Jan 2014 09:47 PM |
| How about you figure it out for yourself, a bunch of third graders are not going to know this, okay :P |
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pieguy26
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| 04 Jan 2014 09:48 PM |
| I got 105, but am not sure if it was correct. |
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snappy111
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Powmonkey
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| 04 Jan 2014 09:49 PM |
105
It's 15 choose 2 = (15*14)/(1*2) = 105
#COMRADEPOWPOWER |
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pieguy26
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| 04 Jan 2014 09:49 PM |
twister- but the one that does pays off
there are smart people on here as well. |
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Powmonkey
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| 04 Jan 2014 09:49 PM |
I'm taking pre-calculus.
You could also use wolfram alpha, that'd probably a lot more helpful.
#COMRADEPOWPOWER |
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pieguy26
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swordron
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| Joined: 23 Jun 2008 |
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| 04 Jan 2014 09:50 PM |
| Wait did you say you're in harvard, how old are you? |
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