2. What is geometric magnitude? Ans. That which has extension in space.
3. Name the primary concepts of geometry. Ans. Points, lines, surfaces, and solids.
4. How may lines be divided? Ans. Into straight and curved.
5. How is a straight line generated? Ans. By the motion of a point which has the same direction throughout.
6. How is a curved line generated? Ans. By the motion of a point which continually changes its direction.
7. How may surfaces be divided? Ans. Into planes and curved surfaces.
8. How may a plane surface be generated. Ans. By the motion of a right line which crosses another right line, and moves along it without changing its direction.
9. Why has a point no dimensions?
10. Why has a line neither breadth nor thickness?
11. How many dimensions has a surface?