(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I'm also having trouble with these:

provide the names and sketch the following surfaces:

x^{2}+y^{2}+z^{2}=16

x^{2}+y^{2}=9

x^{2}+2y^{2}+4z^{2}=16

z=-√(9-x^{2}-y^{2})

z=√x^{2}+y^{2}

z=x^{2}+y^{2}

2. Relevant equations

3. The attempt at a solution

So for the first one it's a sphere with radius of 4, yes? And the second is a circle with radius three. These seem fairly obvious but I'm not sure how to go about visualizing the rest...is this something I just need to pick up on or is there a method I should be using?

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# Homework Help: Sketching surfaces

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