Geometry Vocabulary

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Across
  1. 2. line / an extra line or segment drawn in a figure to help complete a proof. Ex: they often create congruent triangles, or they intersect existing lines at right angles.
  2. 6. / a concluding statement reached using inductive reasoning. Ex: Adjacent angles formed by two intersecting lines.
  3. 7. example / an example used to show that a given statement is not always true. Ex: The prime number 2 is a counter example for all prime numbers are odd.
  4. 8. of Change / describes how a quantity is changing over time. Ex: Average speed of a car.
  5. 10. triangle / a triangle with all angles congruent. Ex: A face of a pyramid.
  6. 12. / is an operation that maps an original geometric figure. Ex: going form one quadrant to another.
  7. 15. / the statement that immediately follows the word then. Ex: If a number is even, then (the number is divisible by two).
  8. 17. lines / coplanar lines that do not intersect. Ex: Highway lines, or train tracks.
  9. 18. statement / is of the form if p, then q. Ex: Jr. will walk the dogs IF he finds the leash.
  10. 19. side / the side of a polygon that is a side of each of two angles. Ex: two angles that share the same side.
Down
  1. 1. / in a conditional statement, the statement that immediately follows the word if.Ex: If (a number is even), then the number is divisible by two.
  2. 3. parts / matching parts of congruent polygons. Ex: Two different figures that have some of the same parts.
  3. 4. / opposite meaning, opposite truth meaning. Ex: p= It is Monday. -p= It is NOT Monday.
  4. 5. polygons / polygons in which all matching parts are congruent. Ex: Rubik's cube.
  5. 9. triangle / a triangle with all sides congruent. Ex: Yield sign.
  6. 11. angle / the two angles formed by the base and the congruent sides. Ex: the bottom of a cube.
  7. 13. Reasoning / reasoning that uses a number of specific examples to arrive at a conclusion. Ex: What is the fifth term in the pattern? 2,4,6,8...
  8. 14. triangle / a triangle with no two sides congruent. Ex: A ramp.
  9. 16. lines / lines that do not intersect and are not coplanar. Ex: Opposite lines on a cube.