Geometry crossword

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Across
  1. 4. any angle between 90 and 180 degrees
  2. 6. lines that intersect at right angles to each other
  3. 7. polygon that has 3 angles and 3 sides
Down
  1. 1. measuring less than 90 degrees
  2. 2. any angle that equal 180
  3. 3. a polygon with 4 sides
  4. 5. an angle measuring 90 degrees
  5. 6. lines that are the same distance between apart