Unit 1: Basic Geometry Vocabulary

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