polygon A closed plane figure formed by three or more line segments Examples:	polyhedron A solid figure with flat faces that are polygons Examples:
prism A solid figure that has two congruent, polygon-shaped bases, and other faces that are all rectangles Examples:       rectangular prism         triangular prism	protractor A tool used for measuring or drawing angles Example: The measure of angle ABC is 50°.
pyramid A solid figure with a polygon base and all other faces triangles that meet at a common vertex Example: This is a square pyramid.	quadrilateral A polygon with four sides Examples: