Question

Which two-dimensional shape that exists in quadrant I only of a coordinate graph can be rotated about the y-axis to create a sphere?

Answer 1

semi circle

Explanation:

If you are typing this into a test make sure you use a space between semi circle for full points. :)

Answer 2

The correct answer is:

A semicircle.

Explanation:

Imagine a paper cutout of a semicircle. If you place the flat edge of it against a vertical line and then slowly rotate the cutout along that vertical line, you would be able to see the spherical shape formed by the act of rotating it.

The vertical line of symmetry would form the diameter of the sphere; the arc of the semicircle will form the surface of the sphere.