Geometry Crossword

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Across
  1. 3. two shapes that are the exact same size and shape
  2. 4. points that are all in the same plane
  3. 5. two lines that have the same length
  4. 6. property of a mathematical relation such that if the relation holds between a=b, and b=c then we know a=c
  5. 8. the value of a sentence is "true" of "false", A sentence of the form "if A then B" is true unless A is true and B is false.
  6. 9. any geometric figure is congruent to itself
  7. 10. two angles whose sum equals 180 degrees
Down
  1. 1. two angles whose sum equals 90 degrees
  2. 2. a flat surface that extends infinitely far, it is an analogue of a point.
  3. 4. angles that have the same angle, usually in degrees or radians
  4. 7. angles opposite each other when two lines cross