Unit 1 Geometry Dictionary

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Across
  1. 2. Two angles with a common side and a common vertex
  2. 4. A line, ray, or segment that cuts another line segment at the center dividing the line into two equal halves.
  3. 11. Two lines in the same plane that are at equal distance from each other and never meet
  4. 12. An object with an initial point, a terminal point, and a direction
  5. 13. Two lines that meet or intersect each other at right angles
  6. 15. An exact location. It has no size, only position.
  7. 17. An angle which is measuring less than 90 degrees
  8. 18. Points that lie on the same straight line or in a single line.
  9. 19. Two angles whose sum is 180 degrees
  10. 22. An angle of exactly 90 degrees
  11. 26. Two angles whose sum is 90 degrees
  12. 27. An angle that is equal to 180 degrees
  13. 28. Extends from the x-axis to the vector's most vertical point
  14. 29. A point on a polygon where the sides or edges of the object meet or where two rays or line segments meet
  15. 30. The sum of two angle measures that are joined by a common ray will be equal to the measure of the angle they form.
Down
  1. 1. A line or a line segment that divides a given line segment into two parts of equal measurement
  2. 3. The angles that have equal measure
  3. 5. An angle which is greater than 90° and less than 180°
  4. 6. M = ((x1 + x2)/2, (y1 + y2)/2)
  5. 7. Segments that have the same length
  6. 8. A section of a line bounded by two points or connecting two points
  7. 9. Two adjacent angles that sum to 180 degrees
  8. 10. Extends from its origin to its furthest x-coordinate
  9. 14. A line that splits an angle into two equal angles.
  10. 16. D = √(x2 - x1)^2 + (y2 - y1)^2
  11. 19. If a line segment has two endpoints, A and C, a third point B lies somewhere on the line segment AC if and only if the equation AB + BC = AC is satisfied.
  12. 20. A geometrical figure formed when two rays meet at a common point called vertex.
  13. 21. A flat surface that extends into infinity.
  14. 23. A part of a line that has a fixed starting point but no endpoint.
  15. 24. A one-dimensional figure, which has length but no width and extends infinitely in both directions.
  16. 25. Lying on the same plane.