Geometry Challenge Crossword

I am a three dimensional figure with faces that are polygons.
I am a solid figure with two congruent, polygon-shaped bases, and rectangular lateral faces.
I am a three dimensional figure with a polygon base and triangular lateral faces that meet at a common vertex.
I am a polygon with four sides and four angles.
I am a polygon with all congruent sides and angles.
I am a triangle with no congruent sides.
I am a cube with the length, width, and height of one unit.
I am the measure of the space that a solid figure occupies.
I am a plane figure that is at the bottom of a solid figure.
I am the same size and same shape.
I am a triangle with three congruent sides.
I am a polygon with seven sides and seven angles.
I am a face on a polyhedron that is not the base.
I am a triangle with two congruent sides.
I am a closed plane figure formed by three or more line segments.
I am a polygon with nine sides and nine angles.