What Kind of Quadrilateral is This? (Part 3)

[b]There are four activities (parts) to this discovery investigation. This is part 3/4. [br][color=#0000ff]The link to this lesson activity can be found above the GeoGebra task applet (see below.) [/color][/b]
[color=#0000ff][b][url=https://docs.google.com/document/d/1bFnTdzFgwZl227_mXeAfcd3SkbR7S96ONeR7MLXV6KM/edit?usp=sharing]What Kind of Quadrilateral is This? (Part 3)[/url][/b][/color][br][br][b]The link for part 4/4 of this lesson activity can be found below the applet.[/b]
Use this applet for PART 3.
Link to Part 4:[br][br][color=#0000ff][b][url=https://www.geogebra.org/m/cyPKSY9C]What Kind of Quadrilateral is This? (Part 4)[/url][/b][/color]
– Tim Brzezinski

Information: What Kind of Quadrilateral is This? (Part 3)