well to be inforamtive its does not,i am a well known rocket scientist as you should all know my name dr.lee
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None.A triangle (not traingle) has 3 vertices (not vetices).
Assuming that what you call a "traingle" is actually a triangle, the formula is that one of the vertices has a measure of 90 degrees.
A triangular based pyramid has 4 faces, 6 edges and 4 vertices
Assuming that a traingle is meant to be a triangle, then the answer is none.
3... If its a traingle it has 3 angles where the sides meet.