MC^2

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Across
  1. 5. a way of finding the value of a variable in an expression/equation
  2. 6. an angle smaller than 90 degrees
  3. 7. the sum of two angles whose sum is equal to 180 degrees
  4. 9. the space between two intersecting lines (measured in degrees)
  5. 10. the sum of two angles whose sum is equal to 90 degrees
  6. 12. a two dimensional shape with three edges and three vertices
  7. 13. the sum of all the edges that make up a two dimensional shape
Down
  1. 1. a type of triangle whose edges are all different measures
  2. 2. an angle larger than 90 degrees and less than 180 degrees
  3. 3. a two dimensional shape whose opposite sides are parallel
  4. 4. an angle larger than 180 degrees
  5. 8. the measure of the space between all of the edges of a two dimensional shape
  6. 11. the name of the seventh grade Greendale Middle School accelerated math teacher