4. P1,P2,...,P100 are 100 points on the plane, no three of them are collinear. For each three points, call their triangle clockwise if the increasing order of them is in clockwise order. Can the number of clockwise triangles be exactly 2017?
help me solving the problem
geometry(iranian geometry olympiad 2017)
 ahmedittihad
 Posts: 174
 Joined: Mon Mar 28, 2016 6:21 pm
Re: geometry(iranian geometry olympiad 2017)
What help do you need?
Frankly, my dear, I don't give a damn.
Re: geometry(iranian geometry olympiad 2017)
I am being unable of understanding the main concept of the problem. Truly to say ,can't understand the problem. I would be grateful if you do help me
 ahmedittihad
 Posts: 174
 Joined: Mon Mar 28, 2016 6:21 pm
Re: geometry(iranian geometry olympiad 2017)
Okay so you're having difficulty in understanding what clockwise is. In the picture $ABC$ is clockwise and $A_1B_1C_1$ is counterclockwise.
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Frankly, my dear, I don't give a damn.
 samiul_samin
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