geometry

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Across
  1. 3. Trapezoid Plane Line segment Arc
  2. 5. Equilateral Right angle Obtuse Acute
  3. 6. Pentagon Isosceles Scalene Polygon
  4. 7. Concave Supplementary Complementary Ray
Down
  1. 1. Congruent Intersection Parallelogram Line
  2. 2. Symmetry Hexagon Pyramid Prism
  3. 4. Adjacent Vertical Parallel Bisec