A pyramid.
A tetrahedron (4 faces) or triangular bipyramid (5 faces).
pyramid
a rectangular pyramid and a square pyramid
A hexagonal pyramid.
It could be a pyramid shape
Pyramid, base
a base
Polygons aren't normally described as having faces Polyhedrons are normally described as having faces So it could be a tetrahedron which is a triangular based pyramid
Three or more, as many as the number of sides of the base. Pyramids can have base that are triangles, squares rectangles, or any planar polygon.
A pyramid is a solid figure with one face that is a polygon and three or more faces that are triangles with a common vertex. Yeah, pg. 114 in the math workbook is a little hard, and the guy who answered this before me thought it was funny to improve the answer by saying the answer was 45. That's just not mature. I don't get it. Anyway, I hope you finish your homework at this rate.
I need help with that too!
triangular prisum