Question

if a semi - circle was rotated about the y - axis, like the one shown below, what would be the resulting three - dimensional shape? cone sphere cylinder pyramid

Explanation:

Step1: Recall 3 - D shape formation

When a 2 - D shape is rotated about an axis, a 3 - D shape is formed. A semi - circle rotated about its diameter (in this case, the y - axis which acts as the diameter for the semi - circle in the x - y plane) forms a sphere.

Answer:

Sphere