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

Why? What is a straight line?

What kind of a line is 11 16?

Why? What is a crooked line?

What kind of a line is o p?

Why? What is a curved line?

What kind of a line is s t?

Why?

What kind of a line is 9 10?

Why? What is a spiral line?

What kind of a line is w x?