Geometry Unit 1-2 (little bit of 3) Crossword problem

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Across
  1. 4. a^2+b^2=c^2
  2. 6. Two angles whose sum is 180 degrees
  3. 7. A line that intersects a segment's midpoint at 90 degrees, forming right angles.
  4. 15. A fixed point where all points are enlarged or reduced.
  5. 16. The shape after its transformation.
  6. 17. A type of transformation that moves every point of the figure by the same distance in a certain direction.
  7. 18. The original shape before the transformation.
  8. 19. A type of transformation in which the pre-image and the image have the same shape.
  9. 20. The measure of the exterior angle of a triangle is greater than either of the measures of the remote interior angles.
Down
  1. 1. The value of x in a/x=x/b
  2. 2. A form of reasoning based on facts.
  3. 3. A pair of non-adjacent angles located on the same side of the transversal line. These two angles will be congruent.
  4. 5. If two sides of a triangle are congruent, then angles opposite those sides are congruent.
  5. 8. A pair of angles that are between the two lines and on the same side of the transversal. These two angles will be supplementary.
  6. 9. SSS, SAS, ASA, AAS, HL
  7. 10. A segment connecting the midpoints of two sides of a triangle. This segment is parallel to the base of the triangle and is half of it.
  8. 11. A form of reasoning based on a set of observations.
  9. 12. A pair of angles that are between the two lines and on opposite sides of the transversal. These two angles will be congruent.
  10. 13. Two statements connected by the words "if and only if."
  11. 14. Results from a one to one matching of sides and angles from one figure to another.