Question

If you multiply 2 xr you will get the *

-radius
-circumference
-diameter
-area

Answer 1

you will get the diameter

Answer 2

Diameter

Explanation:

Variable r stands for radius.

The radius is half of the length within the circle from the two farthest points.

Multiplying this radius will get you the diameter, which is the full length (instead of half) within the circle from the two farthest points.