Question

Explain what the Diameter is and how is the radius related to it.

What can the radius and Diameter help us find?

Answer 1

The diameter is the length of the line through the center that touches two points on the edge of the circle. It is related to the radius because whatever the diameter is is double what the radius is. In differential geometry, the diameter is an important global Riemannian invariant.

Explanation:

Answer 2

The diameter is any straight line that passes through the center of the circle, which endpoints can lie on. The radius is half the diameter. They help us find the circumference of a circle