GEOMETRY WORDS

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Across
  1. 1. lying on the same plane
  2. 4. a technical drawing instrument that can be used to draw different geometrical shapes
  3. 8. the exact opposite
  4. 9. where two objects meet
  5. 10. the logical operation that reverses the truth value of a given statement
  6. 11. That sort of reversal
  7. 13. a statement to be proved
  8. 14. the geometrical concept of a flat surface with no edges or thickness
  9. 15. a special kind of example that disproves a statement or proposition
Down
  1. 2. two rays that have the 'same endpoint and extend in opposite directions
  2. 3. a point at which a line segment or a ray ends
  3. 5. the branch of mathematics that deals with shapes, angles, dimensions and sizes of a variety of things we see in everyday life
  4. 6. two or more points are said to be collinear, if they lie on the same line
  5. 7. a mathematical statement that has not yet been rigorously proved
  6. 12. portions of lines that are defined by two distinct endpoints