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Is this radius or diameter

Is this radius or diameter-example-1

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8 votes

Hi!

The given line is a radius.

What's the difference between a diameter and a radius?

A radius begins from the center of a circle (or sphere) and goes to the end, and it's a straight line.

A diameter is the longest distance between 2 random points on a circle, so it goes all the way across.

In this problem, the line starts at the middle of the circle and goes to the end, so it is, in fact, a radius.

It's not a diameter because it can not go all the way across, since we don't even have all of the sphere.

User Kenju
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