MATHS CHALLENGE CROSSWORD

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Across
  1. 5. IT'S A THOUSAND MILLION
  2. 8. YOU MEASURE ANGLES WITH ONE OF THESE
  3. 9. IT'S AN ACCURATE GUESS
  4. 10. AN ANGLE BETWEEN 180 AND 360 DEGRESS
Down
  1. 1. A TYPE OF TRIANGLE WITH NO SIDES EQUAL
  2. 2. IT'S THE OPPOSITE OF ADD
  3. 3. THE DISTANCE ACROSS A CIRCLE
  4. 4. A TYPE OF MATHS WHICH USES LETTERS
  5. 6. A NUMBER LESS THAN ZERO IS
  6. 7. IT CAN BE LINE OR ROTATIONAL