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

The triangle B is also equal to the triangle C.

What do you think of the two triangles A and B? Why?

If two things are separately equal to the same thing, they are equal to each other.

Axiom 2.

The square A is equal to the square B.

To the rectangle C add the square A, and we have an L pointing in what direction?

To the same rectangle C add the square B, and we have an L pointing in what direction?

Which is larger, the L pointing to the left, or that pointing to the right?