Unit 1: Basic Geometry Vocabulary

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Across
  1. 1. A line that extends indefinitely in one direction
  2. 6. An angle with a degree measure greater than 90.
  3. 7. Adjacent angles that are supplementary. Combined, they form a straight line.
  4. 8. An angle with a degree measure less than 90
  5. 9. Segment: A measurable part of a line consisting of two endpoints
  6. 10. An angle with a degree measure of 90.
  7. 12. Two lines that intersect at a 90 degree angle (right angle)
  8. 13. Two angles with measures that sum to 90 degrees.
  9. 17. The formula used to find the midpoint between two endpoints.
  10. 18. If A, B, and C are collinear points and B is between A and C, then AB + BC = AC
  11. 21. Two angles with measures that sum to 180 degrees.
  12. 23. Two angles that have the same measure.
  13. 24. A line or ray that divides an angle into two equal parts.
  14. 26. The intersection of two rays at at an endpoint.
  15. 27. The formula used to find the distance between two points on a coordinate plane.
  16. 28. The common endpoint of an angle, where the sides intersect.
  17. 29. Points that lie on the same plane
Down
  1. 2. Two angles that share a common side and vertex.
  2. 3. A segment, line or plane that intersects a segment at its midpoint.
  3. 4. Two angles directly across from each other on intersecting lines. (always congruent)
  4. 5. Two lines that never intersect.
  5. 11. A line, segment, or ray perpendicular to a segment at its midpoint.
  6. 14. iF <ABD and <DBC are adjacent, then <ABD + <DBC = <ABC.
  7. 15. Is made up of points with no thickness or width
  8. 16. Two segments that have the same length
  9. 19. A flat surface made up of points and extends indefinitely in all directions.
  10. 20. An angle with a degree measure of 180.
  11. 22. A location with no size or shape
  12. 25. Points that lie on the same line.