Question

use the questions below to keep track of key concepts from this lessons study activity.

1. practice: organizing information

fill in the blanks in the list to define polyhedron.
polyhedron

• a ____ -dimensional solid
• bounded by polygons, called ____
• encloses a single region of ____

1. practice: making mental images and organizing information

complete the chart.

polygon part	what is it?
	a line segment
	a polygon

1. practice: using visual cues

label one vertex, one edge, and one face on this cube.

1. practice: making mental images

how are oblique and right polyhedrons different?

Explanation:

1. A polyhedron is a three - dimensional solid. The polygons bounding it are called faces, and it encloses a single region of space.
2. The parts of a polygon corresponding to a point is a vertex, to a line segment is an edge, and to a polygon is a face.
3. For the cube, a vertex is a corner point, an edge is a line - segment where two faces meet, and a face is a flat polygon surface.
4. In a right polyhedron, the lateral edges are perpendicular to the bases. In an oblique polyhedron, the lateral edges are not perpendicular to the bases.

Answer:

1. three; faces; space
2. vertex; edge; face
3. (Student needs to label on the cube drawing. For example, label a corner as vertex, a line - segment between two vertices as edge, and a flat side as face)
4. In a right polyhedron, lateral edges are perpendicular to bases. In an oblique polyhedron, lateral edges are not perpendicular to bases.