How it works ?
Step 1: Drag points A and B around, changing the slope of the segment.
Step 2: Notice the Midpoint of the segment. Notice the Midpoint Coordinates.
Step 3: Click on each check box to hide the answer and the hint.
Step 4: Drag points A and B around again.
Step 5: Calculate the Coordinates of the Midpoint of segment from A and B.
Step 6: Repeat until you get 10 correct!