face - any of the polygons that make up and object's boundaries.
prism - an object that has two congruent and parallel faces (bases) and other faces that are parallelograms.
edge - where, on the shape, two or three sides meet.
perpendicular - at a 90 degree angle.
polygon - a closed shape consisting of line segments.
vertex - the point where two sides on a shape meet, or the point where three or more edges meet.
right prism - A three-dimensional shape with two identical parallel bases, with all other faces as rectangles.
regular polygon - a polygon having all sides and angles equal.
congruent - shapes that match exactly but don't always have the same orientation.
