Geometry Unit 1A Vocabulary

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Across
  1. 1. an angle with degree measure equal to 90
  2. 6. the common endpoint of an angle
  3. 10. having the same measure
  4. 17. a straight path that extends in two opposite directions without end
  5. 19. a flat surface that extends without end in all directions
  6. 20. a location marked by a dot
  7. 23. points that do not lie on the same line
  8. 24. instrument used for drawing straight lines
  9. 25. two angles with measures that have a sum of 180
  10. 27. a unit of measure used in measuring angles and arcs
  11. 28. an angle with degree measure equal to 180
  12. 29. a segment, line, or plane that intersects a segment at its midpoint
  13. 30. an angle with degree measure greater than 90 but less than 180
  14. 31. three or more points that lie on the same plane
  15. 32. the length of the segment between two points
  16. 33. a set of points common to two or more geometric figures
Down
  1. 2. all the space on the inside of an angle
  2. 3. an instrument for drawing circles and arcs and measuring distances between points
  3. 4. two nonadjacent angles formed by two intersecting lines
  4. 5. part of a line that has two endpoints and can be measured
  5. 7. two or more points that lie on the same line
  6. 8. part of a line that has exactly one endpoint and extends without end in only one direction
  7. 9. for any two points on a line, there is a point that lies on the same line between them
  8. 11. two angles with measures that have a sum of 90
  9. 12. the point on a segment exactly halfway between the endpoints of the segment
  10. 13. an angle with a degree measure less than 90
  11. 14. having the same size and shape
  12. 15. a pair of adjacent angles whose non-common sides are opposite rays
  13. 16. If D is on the interior of <ABC, then <ABD + <DBC = <ABC
  14. 18. an accepted rule or fact
  15. 21. lines, segments, or rays that form right angles
  16. 22. form by two rays joined at their endpoint
  17. 24. given two points A and C, a third point B lies on the line segment if and only if AB + BC = AC
  18. 26. points that do not lie on the same plane