HELP PLEASE! I'm so confused! My homework is asking me what 3D shape will be created when a square is rotated about the y-axis. I'm thinking that the 3D shape will be a cylinder? But it also asks to explain why it would be that 3D shape, if someone could help me, youd be a life saver lol

Question

pawanyadav · Answer

I think a cylinder

anonymous · Answer

Thats what im thinking too, but it asks me to explain why?  -_- ugh i hate geometry

pawanyadav · Answer

Because the vertex rotates in a circle of 
radius equal to side of square so upper and lower face forms circles ,,which are characteristics of cylinders.

vocaloid · Answer

well, when we take the a straight line and rotate it about an axis, we get a circle

is that clear?

dariusx · Answer

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yup, it's a cilinder

anonymous · Answer

hey guys, thank you so much! sorry, my internet cut out for a minute but that makes so much more sense i appreaciate it!