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

A straight line is the shortest distance between two points.

Axiom 11.

If two things coincide throughout their whole extent, they are equal.

THEOREMS ILLUSTRATED.

Diagram 29.

DEVELOPMENT LESSON.

Do the angles Blue, Red, take up all the space on the line a b?

Do the angles Blue, Yellow, Red, take up all the space on the line?