Complementary and Supplementary Angles

Directions: Using the digits 0-9, at most one time each, fill in the boxes to make the statement true:


What does complementary or supplementary mean?


Answers can vary, one possible solution is:
04 + 86 = 90
123 + 57 = 180

Source: Bryan Anderson

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Similar Triangles And Slope

Directions: The three triangles on the line are similar. Using the digits 0 to 9 …


  1. This can be an amazing warm up full of conjectures. Here’s a video of my class going HAM on this.

  2. Might check the spelling of complementary in the title

  3. The provided solution doesn’t work, as zero is shown twice in the first line.

  4. 03 + 87 = 90
    124 + 56 = 180

  5. It doesrnt have to start with a zero it just looks nicer that way.

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