geometry crossword

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Across
  1. 3. two angles whose sum is 90 degrees.
  2. 5. coplanar infinite straight lines that do not intersect at any point.
  3. 7. two angles that are side by side and share a common vertex and a common side.
  4. 12. formed when a transversal passes through two lines.
  5. 13. an angle that is exactly equal to 90 degrees in measure.
  6. 15. any two angles whose measures sum to 180 degrees.
Down
  1. 1. identical in shape and size.
  2. 2. if they have the same shape, or if one has the same shape as the mirror image of the other.
  3. 4. an angle that measures more than 90° and less than 180°
  4. 6. the angle between adjacent sides of a rectilinear figure.
  5. 8. when two straight lines or rays meet at a common endpoint.
  6. 9. an angle that measures less than 90 degrees
  7. 10. the angles that lie opposite to each other when two lines intersect.
  8. 11. a point on a polygon where the sides or edges of the object meet
  9. 14. an infinitely long object with no width, depth, or curvature.