Marks' first lessons in geometry / In two parts. Objectively presented, and designed for the use of primary classes in grammar schools, academies, etc.

by Bernhard Marks

Draw one with lines five inches long.

Which is the greater, first or the second?

Diagram 16.

LESSON NINETEENTH.

POLYGONS.

Name any thing besides your desk that has a flat surface.

A flat surface is called a plane.

How many sides has the plane Fig. A? (Diagram [16].)