On 15-12-2009 1:05, nemesis wrote:
> Jim Henderson wrote:
>> On Mon, 14 Dec 2009 18:26:00 -0500, Warp wrote:
>>
>>> How many triangles can you find in the attached image?
>>
>> I count 21.
> 
> I've gone 'til 26.

Wow, which ones did I miss?
Counting all that include the top and the lower line:
4 of about a quarter surface
3 of half
2 of 3/4
1 whole
That is 10
Another 10 when we don't use the lower line but the diagonal from left 
bottom to right middle
The triangle that uses that diagonal and the two bottom line
and finally (?) the left most small part of that triangle

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