Mathematics crossword

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Across
  1. 2. I am a line segment trapped inside a circle touching the edge twice but I never escape
  2. 3. I am the ultimate forbidden lover line that gets infinitely close to a curve but can never touch it
  3. 7. I am the balancing point of a triangle where its three medians play seesaw
  4. 8. I am what remains when you ruthlessly chop the top off a party cone or pyramid
  5. 9. I am the ultimate absolute zero where X and Y hold hands on a grid
  6. 10. I am a greedy line that cannot settle for just touching a circle so I cut right through it twice
Down
  1. 1. I am a chaotic number like Pi or Root Two that goes on forever without repeating a pattern
  2. 4. I am the mysterious Greek letter that math teachers use as a placeholder for a missing angle
  3. 5. I am the magic numbers that crash a polynomial function and reduce its total value to nothing
  4. 6. We look like identical twins but one of us went through a photocopier shrink filter