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

PART FIRST.

LESSON FIRST.

LINES.

Note to the Teacher.—In all the development-lessons, the pupils are to be occupied with the diagrams, and not with the printed matter.

See Note [A], Appendix.

Refer to Diagram [1], and show that

What are here drawn are intended to represent length only.

They have a little width, that they may be seen.

They are called lines.

A line is that which has length only.