The triangular numbers are the numbers of dots it takes to
draw a triangle using only dots, as the pictures below
show. Each one has 1 dot in the top row, 2 dots in the
2nd row, 3 dots in the 3rd row, 4 dots in the 4th row,
etc.
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1 1+2 1+2+3 1+2+3+4 1+2+3+4+5 1+2+3+4+5+6 1+2+3+4+5+6+7
dot =3 =6 =10 dots =15 dots =21 dots =28 dots
dots dots
So the answer to
triangular numbers are created by adding consecutive
counting numbers? True or False?
is TRUE, provided you start with the counting number 1.
Edwin
