The [b]vertices[/b] in the manipulatives below are represented by the [b][color=#ff0000]red points[/color][/b]. How would you define a vertex? [br][br]The [b]edges[/b] are represented by the [b][color=#0000ff]blue segments[/color][/b]. How would you define an edge?[br][br]The [b]faces[/b] are represented by the shaded surfaces. The [b][color=#bf9000]yellow shaded surfaces[/color][/b] are faces, and the [b][color=#6aa84f]green shaded surfaces[/color][/b] are[b] bases[/b]. Bases are a specific type of face. How would you define faces and bases?[br][br]_____________________________________________________________________________________________________[br][br][b]Directions:[/b] Rotate each figure to view all of its vertices, edges, faces, and bases. To rotate the figures, make sure your mouse is next to the figure and not on it.

[size=85][b]Hint:[/b] The [b]faces[/b] of this pyramid (except the base) are all triangles, and they meet together at what looks like the “top” or “tip” of the pyramid. You can think of the [b]base[/b] as the face that is left out and does not get to meet up with all the others at one “tip” or vertex. Triangular pyramids are a special case that can technically have ANY face as their base.[/size][br][br][br]_____________________________________________________________________________________________________

Cones, cylinders, and spheres also contain [b]curved edges[/b] and [b]curved surfaces[/b]. [br][br][b]Curved edges[/b] will be represented by [b][color=#ff7700]orange[/color][/b] circles, and [b]curved surfaces[/b] will be represented by [b][color=#ff00ff]pink[/color][/b] bent or curved "faces." How would you define each of these in your own words?

[size=85][b]Hint:[/b] Does this figure look strange to you? What do you NOT see here that you do see in cylinders and cones? [/size]