Given a cube, how many acute angles triangles are there whose vertices are of vertices that cube?
Is there a simpler way to solving this?
Hello, clarebear14!
Given a cube, how many acute-angled triangles are there
whose vertices are vertices of that cube?
Is there a simpler way to solving (Thinking) this?
We find that most triangles are right triangles.
The exceptions are eight equilateral triangles
. . formed by the diagonals of the faces.
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