Geometry

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Across
  1. 2. measure of angles of equilateral triangle
  2. 3. the angle with measure more than 180
  3. 4. coplanar lines which do not intersect
  4. 6. a regular quadrilateral
  5. 7. sum of measures of complementary angles
  6. 9. a polygon having six sides
Down
  1. 1. Largest side of right angled triangle
  2. 5. the angle with measure less than 90
  3. 8. three sided closed figure