Proper or degenerate

Exercise and reference answers

Categories

1. Proper
2. Degenerate

Questions

1. Answer

   Proper

   Question

   Plane misses the vertex

2. Answer

   Degenerate

   Question

   Plane cuts at the vertex

3. Answer

   Degenerate

   Question

   The section is a point

4. Answer

   Proper

   Question

   The section is a circle

5. Answer

   Degenerate

   Question

   A single straight line

6. Answer

   Degenerate

   Question

   Two crossing lines

7. Answer

   Proper

   Question

   A full ellipse

Instructions

Pull each case towards the kind of section it gives.

Explanation