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Midpoint Definition

In the app below, point M is said to be the midpoint of . Interact with this app for a minute. After doing so, please answer the question below.

Be sure to change the locations of points A and B each time before re-sliding the slider!

The app above dynamically illustrates the definition of a midpoint of a segment. Without using the words "half", "halfway", or "middle", explain what a midpoint of a segment is in your own words. That is, complete the following sentence definition: A midpoint of a segment is a...