2nd Block CrossWord Puzzle

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Across
  1. 4. A prism with 6 faces
  2. 6. Crosses the center of a circle
  3. 9. Equals 90 Degrees
  4. 11. A segment whose endpoints lie on a circle
  5. 12. End of a segment
  6. 15. Correspond exactly
  7. 17. Flipped over Y-axis
  8. 19. Same size and shapes
  9. 20. Middle of a circle
Down
  1. 1. When divided equal on both sides
  2. 2. A polynomial with two terms
  3. 3. Middle of a line segment
  4. 5. Equals 180 Degrees
  5. 7. Same shape,Smaller size
  6. 8. opposite from the right angle in a triangle
  7. 9. Distance around a circle
  8. 10. Number a+bi
  9. 13. Straight path
  10. 14. Divide into two
  11. 16. A eight-sided figure
  12. 18. In the middle