So stage 1 of of Israel's International Mathematical Olympiad selection process took place on Monday, and this was one of the questions (6 or 7 out of 10).
Q:
(The way the shape is produced wasn't inscribed, but its a pretty easy guess): Draw an interval from each vertex of a square to the 2 midpoints of the sides it is not on.
How many triangles are there in the shape?
Is there a (viable) way to solve questions similar to the one I showed?
from Hot Weekly Questions - Mathematics Stack Exchange
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