Question

What 3-dimensional shape is formed when the right triangle ABC is rotated 360° about its side AB?

Answer 1

So the answer is a cone

Explanation:

When a triangle ABC is rotated by 360° by it's side AC having angle ∠C=90°, we get the shape of a cone. If ∠B=90°, then the right triangle ABC is rotated 360° about its side AC we get the shape of a Two cones attached with each other.

Answer 2

For this problem, you have to rely on your imagination.If not, you can take practical things and try rotating them 360 degrees and see the possible shape. However, for this problem, the resulting solid figure would be like two cones in which the bases are put together (shown in attached picture).