Geometry Vocabulary 1

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Across
  1. 3. Two angles that share a common side and vertex.
  2. 7. Lines that intersect to form right angles (90°).
  3. 9. Two adjacent angles whose non-common sides form a straight line (sum is 180°).
  4. 12. The point where two rays, segments, or lines meet to form an angle.
  5. 13. The size of an angle, usually measured in degrees.
Down
  1. 1. Lines that cross at a point.
  2. 2. A part of a line that starts at a point and extends infinitely in one direction.
  3. 4. Two angles whose measures add to 90°.
  4. 5. Two angles whose measures add to 180°.
  5. 6. Opposite angles formed by intersecting lines (always congruent).
  6. 8. A part of a line with two endpoints.
  7. 10. A straight path with no thickness that extends infinitely in both directions.
  8. 11. Lines in the same plane that never intersect.