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Posted : February 25, 2023 6:46 am
18
Posted : February 25, 2023 6:54 am
I only see 22,
Posted : February 25, 2023 9:42 am
21
Posted : February 25, 2023 9:43 am
19
tricky
on the eyes
Posted : February 25, 2023 9:47 am
I'm up to 22, like HC.
By symmetry it has to be an even number.
Posted : February 25, 2023 10:54 am
I only see 8 enclosed on all sides?
Posted : February 25, 2023 1:22 pm
3^3=27
Posted : February 25, 2023 1:41 pm
I see 22 triangles.
Posted : February 25, 2023 2:52 pm
For every triangle pointing up there is one pointing down. I colored only half for clarity.
Corrected figure (I sketched one of them wrong before but the count was right):
Posted : February 25, 2023 4:28 pm
