Geometry: Basic Terms

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Across
  1. 3. divide into two equal parts
  2. 5. part of a line with two endpoints
  3. 8. This undefined term describes a precise location in space. It is the smallest element in geometry.
  4. 9. a point that divides a segment into two congruent segments
  5. 12. This undefined term describes a set of points with infinite length, but no width.
  6. 15. __ angles are a pair of nonadjacent angles formed by two intersecting lines.
  7. 16. __ angels are two angles whose measures have a sum of 90 degrees.
  8. 17. not all on the same line
  9. 18. the set of all points
  10. 21. two figures that are the same size and shape
  11. 22. A __ pair of angles are two adjacent angles whose noncommon sides form a pair of opposite rays.
  12. 24. __ angles are two angles with a common vertex and a common side, but no common interior points.
Down
  1. 1. a figure formed by two rays with the same endpoint
  2. 2. __ lines are two lines that intersect to form right angles.
  3. 4. angle an angle that measures exactly 180 degrees
  4. 6. a statement (or rule) accepted without proof
  5. 7. __ angles are two angles whose measures have a sum of 180 degrees.
  6. 10. a statement (or rule) that can be proven
  7. 11. on the same line
  8. 13. part of a line with one endpoint
  9. 14. not all on the same plane
  10. 19. on the same plane
  11. 20. Opposite rays are two collinear rays with the same __. Together, they form a straight angle.
  12. 23. This undefined term describes a set of points with infinite length and width, but no thickness.