Pascal´s Triangle

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Across
  1. 2. Each line of numbers across the triangle.
  2. 6. You do this to make new numbers in the triangle.
  3. 7. The numbers show these in binomial expansions.
  4. 8. The shape of Pascal’s pattern.
Down
  1. 1. If you add 1 and 1, you get this number in the second row.
  2. 3. The first number at the top of the triangle.
  3. 4. The last name of the man who made the triangle.
  4. 5. The triangle looks the same on both sides.