Question

consider the sphere.
identify the parts of a sphere.
represents the diameter.
represents the radius.

Explanation:

Step1: Recall the definitions

A diameter of a sphere is a straight line passing through the center and connecting two points on the surface. A radius is a straight line from the center to a point on the surface.

Step2: Analyze the diagram

Looking at the diagram, \(b\) and \(d\) are lines passing through the center and connecting two points on the surface (so they are diameters). \(a\) is a line from the center to a point on the surface (so it is a radius).

Answer:

\(b\) and \(d\) represent the diameter; \(a\) represents the radius.