Geometry Unit 2

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Across
  1. 3. the steepness of a line on a graph, equal to its vertical change divided by its horizontal change; RISE OVER RUN
  2. 7. y = mx + b (3 words)
  3. 9. A point that divides a segment into two congruent segments
  4. 10. A non-Euclidean geometry in which a plane is defined as the surface of a sphere (2 words)
  5. 14. A figure that results from the transformation of a geometric figure. Vertices are capital letters with an apostrophe, (A' -- A prime)
  6. 15. y-y₁=m(x-x₁) (3 words)
  7. 17. points that lie on the same line
  8. 18. the original figure in a transformation
  9. 20. lines in the same plane that never intersect
  10. 22. all angles are congruent
  11. 25. in the direction that is opposite of the direction the hands on the clock move
  12. 26. the point at which two lines or planes meet and cut across each other
  13. 27. moving or changing of a figure or preimage
  14. 29. Part of a circle connecting two points on the circle.
  15. 30. The point of intersection of two sides of a polygon. the corners of figures
  16. 31. The length of a path between two points
Down
  1. 1. Two lines that intersect to form right angles
  2. 2. Having the same size and shape
  3. 4. A number of the form -b/a, where a/b is a nonzero rational number. The product of a number and its opposite reciprocal is -1. (perpendicular lines' slopes) (2 words)
  4. 5. A plane that is divided into four regions by a horizontal line called the x-axis and a vertical line called the y-axis (2 words)
  5. 6. c always represents the hypotenuse and a and b represent the other sides of a right triangle; used to find distance (2 words)
  6. 8. in the same direction as the rotating hands of a clock
  7. 11. A transformation in which a figure is turned about a fixed point
  8. 12. another word for dilation; changing the size of figures but not the shape
  9. 13. a²+b²=c²
  10. 16. A geometrical system in which a plane is a flat surface made up of points that extend infinitely in all directions (2 words)
  11. 18. being relative in size and shape, result of a scale factor
  12. 19. A transformation that "flips" a figure over a mirror or line of reflection.
  13. 21. A transformation that "slides" or moves each point of a figure the same distance in the same direction.
  14. 23. A transformation that changes the size of an object, but not the shape. using a center point and scale factor
  15. 24. a circular line on the surface of a sphere formed by intersecting it with a plane passing through the center (2 words)
  16. 28. a 2 sided polygon that exists in spherical geometry