Ethan Stradley Crossword puzzle

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Across
  1. 2. arc consisting of half of a circle
  2. 4. term for the quotient of two quantities
  3. 5. segment connecting the midpoints on two sides of a triangle
  4. 6. term for a segment joined by points
  5. 7. a noncollinear point
  6. 10. term for the point of concurrency in a triangle
  7. 12. a shape formed by 3 noncollinear points connected by segment
  8. 15. a parallelogram with four congruent sides
  9. 16. term for the nonparallel sides of a trapezoid
  10. 17. term for the parallel sides of a trapezoid
  11. 19. an equation stating that two ratios are equal
  12. 20. the perpendicular segment from a vertex of the triangle to the line containing the opposite side
Down
  1. 1. a parallelogram with four congruent right angles
  2. 3. distance around a circle
  3. 8. a parallelogram with only one pair of parallel sides
  4. 9. A segment joining two nonconsecutive vertices of a convex polygon
  5. 11. first and last number of a proportion
  6. 13. term for a triangle with 3 equal sides
  7. 14. the middle two numbers of a proportion
  8. 18. a quadrilateral with both pairs of opposite sides parallel