Maths

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Across
  1. 3. Lines that intersect to form right angles
  2. 8. Used to measure angles
Down
  1. 1. triangle where all sides are different lengths
  2. 2. Flat surface that continues in all directions
  3. 4. All sides of this triangle are equal
  4. 5. Angle that masures 180 degrees
  5. 6. A branch of maths
  6. 7. Angle that measures exactly 90 degrees