Open Middle: Building Quadrilaterals

Tim Brzezinski, Deborah Ball, Feb 8, 2021

Ditch those worksheets! This book serves as a collection of digitally interactive [b][color=#1551b5]Open Middle problems[/color][/b]. Be sure to check out Open Middle's site: [url]https://www.openmiddle.com/[/url]. This volume will continue to grow over time. This book also contains great resources from Steve Phelps and John Ulbright.

Table of Contents

  1. Geometry (7-12)
    1. Open Middle: Building Parallelograms
    2. Open Middle: Building Rectangles
    3. Open Middle: Building Rhombuses
    4. Open Middle: Building Squares
    5. Open Middle: Building Trapezoids
    6. Open Middle: Building Isosceles Trapezoids
    7. Open Middle: Building Kites

1.

Geometry (7-12)

  • 1. Open Middle: Building Parallelograms
  • 2. Open Middle: Building Rectangles
  • 3. Open Middle: Building Rhombuses
  • 4. Open Middle: Building Squares
  • 5. Open Middle: Building Trapezoids
  • 6. Open Middle: Building Isosceles Trapezoids
  • 7. Open Middle: Building Kites

1.1.

Open Middle: Building Parallelograms

YOUR TASK:
Move points A, B, C, and/or D to create a parallelogram below. Be sure NO COORDINATE REPEATS!
In the app above, use any one (or more) GeoGebra tools to clearly show how you know the quadrilateral you just formed is a parallelogram. Below, explain how what you did above illustrates how your quadrilateral is a parallelogram.
Move points A, B, C, and/or D to create a different parallelogram from the one you created above. Be sure NO COORDINATE REPEATS!
In the app above, use any one (or more) GeoGebra tools to clearly show how you know the quadrilateral you just formed is a parallelogram. Below, explain how what you did above illustrates how your quadrilateral is a parallelogram.
– Tim Brzezinski

1.2.

–

1.3.

–

1.4.

–

1.5.

–

1.6.

–

1.7.

–

Information