They can tesselate - provided they are the correct shapes.
Yes, every triangle will tessellate.
Yes, any triangle will tessellate.
Yes they do tessellate
Triangle, square, hexagon.
No only three can tesselate. they are: An equilateral triangle, a square and a 6 sided hexagon.
By themselves, only 3: triangle, square and hexagon. But there are combinations: eg octagon + square.
Yes, all triangles will tesselate. Twiddle your triangle round so one side is horizontal, and it's easier to see then.
Yes, rectangles tesselate. A tessellation is a tiling pattern.
Because angles on a straight line add up to 180 degrees and the 3 interior angles of any triangle add up to 180 degrees. So it follows that all triangles will tessellate.
No.
No