Consider the trapezoidal numbers 1 1 1 1 2 2 2 1 1 2
     Consider the trapezoidal numbers 1 + 1 + 1, 1 + 2 + 2 + 2 + 1, 1 + 2 + 3 + 3 + 3 + 2 + 1, The nth trapezoidal number is 1 + 2.+ ..n +  n + n .. + 2 + 1 where n is a  positive integer. Complete parts (a) through (c)below.  (a) Create a dot pattern representation of the trapezoidal numbers. selectee correct answer below   
  
  Solution
Option - C

