The Geometry Crossword Puzzle

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Across
  1. 4. Two angles that sum to 90 degrees
  2. 8. Two angles that add to 180 degrees
  3. 12. Rotating an object on a graph
  4. 14. A^2 + B^2 = C^2
  5. 15. The amount of space inside an object
  6. 16. Angle that is less than 90 degrees
  7. 18. Angle greater than 90 degrees
  8. 20. Angle with four straight sides
Down
  1. 1. Middle point of a line
  2. 2. Triangle with two equal sides
  3. 3. Scaling an object bigger or smaller
  4. 5. An object with 2 parallel sides
  5. 6. Length x Width
  6. 7. Sliding an object on a graph
  7. 9. Angle that has 90 degrees
  8. 10. The area an object stands on
  9. 11. Any parallelogram with equal sides
  10. 13. Point where two lines meet
  11. 17. When two sides are the same
  12. 19. All sides equal