Joining the midpoints of the sides of a quadrilateral
- Maurice OReilly
Take any quadrilateral, ABCD, and join the midpoints of the sides to form another quadrilateral.
- What do you notice about the green quadrilateral in this applet?
- Does it have any properties you recognize?
- Can you verify these properties by measurement or some other means?
- What if you move the vertices?
- Do the properties you have found still hold?