Teachers of Maths

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Across
  1. 3. Pi plus no. rearranged (4)
  2. 4. Angle via North of Base rearranged (7)
  3. 5. Load lens differently for volume calculator (8)
  4. 10. Base plus Radius on ear equals mathematician (5)
  5. 11. Pi in a rat? That's irrational! (7)
  6. 13. Sounds like a measurer of fabrics (6)
  7. 15. Scan over no compass direction? Calculate again! (10)
Down
  1. 1. Function of young e squared substitute zero (6)
  2. 2. a thousand years mixed with Roman 50s (7)
  3. 3. Formulate the realm of pi for mathematician (6)
  4. 6. Force won ten to recalculate (6)
  5. 7. Start of circle with South Australia (5)
  6. 8. Sum arc i? Rearrange to find x (7)
  7. 9. Is km divided rot? It’s all there! (11)
  8. 12. No cell on this rearranged (9)
  9. 14. Sum: add a number with no directions (4)