Vocabulary: Volume: The size of a three-dimensional space enclosed within or occupied by an object. Area: The extent of part of a surface enclosed within a boundary, or the extent of the surface of all or part of a solid. Surface Area: The total area of the surface of a three-dimensional object. Vertex: A point where two or more straight lines meet. A corner. Base: The surface that a solid object stands on, or the bottom line of a shape such as a triangle or rectangle. Face: Any of the individual surfaces of a solid object. Edge: The line where two surfaces meet. Regular Polygon: An enclosed shape where all angles and sides are equal. Cube: A box-shaped solid object that has six identical square faces. Cone: A three-dimensional geometric shape that tapers smoothly from a flat base to a point called the vertex. Sphere: A three-dimensional closed surface such that every point on the surface is equidistant from a given point. Rectangular Prism: A solid (3-dimensional) object which has six faces that are rectangles. Cylinder: A solid object with two identical flat ends that are circular or elliptical and one curved side. Triangular Prism: A prism with the cross section of a triangle.