# Sketching paraboloids on paper

I have to teach sketching paraboloids on paper by looking at it's equation. Last year when I taught this topic no one was interested in learning this particular thing. They felt the topic difficult and utter waste of time with so much hard work to do. I know that at first it's difficult to visualize this topic and it becomes a pain to sketch them on paper. But I think it really develops an analytic approach towards coordinate geometry and mathematics in general.

How do I motivate students to take it seriously? Which online source can I refer to supplement my knowledge about this particular topic?

I don't want to repeat what happened last year.

• To what end are you teaching them sketching 3 dimensional objects?
• @Adam I have taught them tracing of conicoids now I want to teach them sketching. For example, sketch the sections of the following conicoids by the planes given alongside. 1. $2y^2 + z^2 = 4$ , the plane $x = y$ Mar 19 '16 at 13:21