7th Grade Angle Relationship Crossword

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Across
  1. 5. each of the pairs of opposite angles made by two intersecting lines
  2. 6. either of two angles whose sum is 90°
  3. 8. two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects
  4. 9. create congruent triangles, or they intersect existing lines at right angles.
  5. 11. either of two angles whose sum is 180°
  6. 12. two angles that have a common vertex and a common side.
  7. 13. When two lines are crossed by another line (which is called the Transversal), the pairs of angles
  8. 14. It is more than 90° and less than 180°
  9. 16. the angles that occupy the same relative position at each intersection where a straight line crosses two others
  10. 18. the angle between a side of a rectilinear figure and an adjacent side extended outward
  11. 19. the angle between adjacent sides of a rectilinear figure
  12. 20. They don't have to point in the same direction. They don't have to be on similar sized lines.
Down
  1. 1. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
  2. 2. the angles opposite two congruent sides of a triangle are also congruent
  3. 3. smaller than a right angle (it is less than 90 degrees).
  4. 4. two angles that are inside the triangle and opposite from the exterior angle
  5. 7. two lines in a plane that do not intersect or touch each other at any point
  6. 10. When two lines are crossed by another line (which is called the Transversal), the pairs of angles
  7. 15. A point where two lines or line segments meet or intersect. A triangle has three vertices
  8. 17. an angle of 180°