Geometry Crossword Puzzle

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Across
  1. 5. When two things are equal to one another
  2. 8. a^2+b^2=c^2
  3. 9. A shape that is closed with 6 sides
  4. 11. The longest side of a right triangle
  5. 14. A line that has two end points
  6. 15. When two lines intersect once to create four right angles
Down
  1. 1. The distance around the edge of a circle
  2. 2. To cut into two equal halves
  3. 3. The measurement of a 3D figure (lxwxh)
  4. 4. Angle An angle that is 90 degrees
  5. 6. The average of the variables in a data set
  6. 7. A polygon with three sides and angles
  7. 10. An angle that is greater than 0 but less than 90
  8. 12. An angle that is greater than 90 but less than 180
  9. 13. A triangle with three equal sides (congruence theorem)