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In the angle below, points B and C are fixed, but AB can rotate in space around BC A If ZABC is always 45° what 3-dimensional shape is created by the rotating segment? Come cylinder pyramid triangular prism​

In the angle below points B and C are fixed but AB can rotate in space around BC A If ZABC is always 45 what 3dimensional shape is created by the rotating segme class=

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Answer: Choice A) cone

One way to picture this is to think of a propeller. As the propeller spins, it carves out a 3D space even though the blade is "2D" in a sense.

If we spin everything around segment BC, we get a 3D cone forming. The base of the cone is vertical and it has a radius of AC. The height of the cone is segment BC. It might help to rotate the paper 90 degrees clockwise so that BC is vertical.

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