Arithmetic progressions, probability & triangles

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Across
  1. 2. The result of a trial
  2. 5. An event that is not part of the experiment or the sample space
  3. 7. a measure of the likelihood of an event to occur
  4. 8. A specific outcome or set of outcomes from the sample space
  5. 9. a polygon with three sides having three vertices
  6. 10. A triangle has three vertice
Down
  1. 1. A triangle with at least two sides that are equal in length
  2. 3. The term that starts the sequence, represented by the letter "a"
  3. 4. The term at position "n", represented by the symbol "an"
  4. 6. The difference between any two consecutive terms, represented by the letter