Question

if a triangle is rotated about the y - axis as shown below, what three - dimensional figure would be formed? square pyramid cylinder cone triangular prism

Explanation:

Step1: Recall 3 - D shape formation

When a right - angled triangle is rotated about one of its legs (in this case, rotating about the y - axis), a cone is formed. The leg about which it is rotated becomes the height of the cone, and the other leg becomes the radius of the base of the cone.

Answer:

Cone