Such a figure is a pyramid.
It is called a face.
A polygonal pyramid.
The answer is a cone
a polygonal prism or a polygond
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.
A conic section.
A face would be considered one flat side of a solid geometric figure.
It can be a sphere, a spheroid, an ellipsoid, etc.
A hexagonal pyramid.
A solid cannot be bounded by one polygon. A solid bounded by polygons is called a polyhedron.
It could be a pyramid shape
I need help with that too!
A square pyramid
A circle is one example of a plane figure that is not a polygon. A V is also not a polygon.
A pyramid is a solid figure with one vertix.