Question 6
The diagram below shows a hexagonal configuration of 19 dots in an equilateral triangular grid.
**(a)** Determine the number of equilateral triangles of different sizes with all three vertices among the 19 dots. Draw an equilateral triangle of each size on the diagram.
**(b)** Determine the number of equilateral triangles of each size.
**(a)** Determine the number of equilateral triangles of different sizes with all three vertices among the 19 dots. Draw an equilateral triangle of each size on the diagram.
**(b)** Determine the number of equilateral triangles of each size.