What is a Radian?

Interact with this app for a few minutes. Then answer the questions that follow.
A [b]radian[/b] is another unit of angle measure (like degrees). Solely from what you've seen above (and without using Google), [b]describe, in your own words, what it means for an angle to measure one radian. [/b]
We know a circle is a full arc that measures 360 degrees. From what you've seen, approximate the number of radians that make a full circle (revolution).
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