Is it always true that the midpoints of a quadrilateral make a parallellogram
Channel: Paul King
Date: 23/07/2017

This is a video to show that near the end of the discourse on quadrilaterals, there is another generalization (big idea) that comes from all of the past activities that we can make use of. In the absence of Geomete's Sketchpad, or other "technologies", students can use a geometry set to construct midpoints and bisectors (they should already know how to do this). In the non-techie instance, all students or pairs of students can try a different set of points, followed by a gallery walk to see for themselves that all students made a parallellogram.

The following playlists contain videos I made, and also very pertinent videos from other sources for educational purposes.

Grade 10 Math Playlist: http://bit.ly/1Sj8qOB
Recreational Math Playlist: http://bit.ly/1ZxoBtI
Grade 12 Advanced Functions Playlist: http://bit.ly/1OoXhWH
Grade 12 Calculus and Vectors Playlist: http://bit.ly/1Sj8qOB
Grade 12 Data Management (discrete math and stats) Playlist: http://bit.ly/1NSCH1q

Chemistry Playlist: http://bit.ly/1QSc82x