Question

Which 2-dimensional shape can be rotated about the y-axis to create a sphere?

Answer 1

circle?

Answer 2

If a semi-circle was rotated quickly about the y-axis, the resulting would be a sphere.

Answer 3

A diagonal cross section of a sphere produces which 2-dimensional shape?
so this question would be a sphere or a circle to?

Answer 4

A vertical semicircle

Answer 5

a circle only. Imagine that you cut a water melon which shape is a sphere into 2 pieces. what can you see on top?

Answer 6

half of a sphere