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Across
  1. 3. This is the maths ______ for triangular numbers.
  2. 6. do it for muscles.
  3. 8. use it to measure angles.
  4. 9. Wear it at school
  5. 10. Teach somone something that is not true.
Down
  1. 1. Someone who performs on a stage.
  2. 2. make a marked change in the form, nature, or appearance of.
  3. 4. Tik Tok is a social media ________.
  4. 5. large rock in space.
  5. 7. give facts or information; tell.