Geometry crossword

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Across
  1. 1. lines line segment parallel line segments
  2. 4. right angle acute angle
  3. 6. angle straight angle vertical angles
  4. 7. line segments intersecting line segments congruent segments
Down
  1. 2. radius
  2. 3. right-angled triangle isosceles triangle
  3. 5. angles supplementary angles parallel lines