Question: Rotating 2d plot around y-axis

Hello Primers

I am doing some homework with the software Maple 2015 where I am supposed to design a lamp through creating some line segments and a circle in a 2d coordinate system. But my question is, how do I add a third dimension and rotate all these line segments around the y-axis, so I can get an idea of how it looks like in 3d?

Here is a picture

Thanks in advance

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