Open Middle: Interior and Exterior Angles of Triangles

Tim Brzezinski, 2 juin 2022

Creation of these resources was Inspired by an Open Middle problem from Jay Sydow.


  • 1. Part 1
  • 2. Smallest and Largest Values? (Part 1)
  • 3. Part 2
  • 4. Smallest and Largest Values? (Part 2)

1.

Part 1

Using digits 0-9 no more than one time each, fill in the boxes on the left to create a triangle with an exterior angle and two remote interior angles. The figure on the right side will be drawn to scale.
Using digits 0-9 no more than one time each, fill in the boxes create another valid setup containing ENTIRELY DIFFERENT ANGLE MEASURES from the setup you created above.
– Tim Brzezinski

2.

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4.

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