Chapter 9.4, Problem 20E

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6th Edition

Daniel C. Alexander + 1 other

ISBN: 9781285195698

Textbook Problem

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The total area (surface area) of a regular octahedron is

a) area of each face.

b) length of each edge.

To determine

**a)**

**To find:**

The area of each face.

Explanation

**Approach:**

1) A polygon is a two dimensional shape form with more than two straight lines.

2) A polyhedron is a three-dimensional solid shape.

3) Each flat surface of a polyhedron is a polygon and is called a face.

4) The line segment where two faces of a polyhedron meet is called an edge.

5) The point where three or more edges of a polyhedron meet is called a vertex.

6) A regular polyhedron is a convex polyhedron whose faces are congruent regular polygons.

**Calculation:**

A regular octahedron is a regular polyhedron with 8 congruent faces. Each face is an equilateral triangle.

Surface area of each face of octahedron

To determine

**b)**

**To find:**

The length of each edge.

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