Question:
To find total number of triangles in a triangular body which has h horizontal lines, two of which do not intersect and v vertical lines which are all dropped from one vertex to its opposite side.
Solution:
The total number of triangles in the figure is:
(h+1)*(h+2)*(v+1)/2
Example :
If h=3 and v=2,
substituting the values of h and v in the formula given above, we get,
Total number of triangles = 30
Note : If a line is dropped from a vertex to its opposite side, it is called as a cevian.
© Rishabh Bidya
To find total number of triangles in a triangular body which has h horizontal lines, two of which do not intersect and v vertical lines which are all dropped from one vertex to its opposite side.
Solution:
The total number of triangles in the figure is:
(h+1)*(h+2)*(v+1)/2
Example :
If h=3 and v=2,
substituting the values of h and v in the formula given above, we get,
Total number of triangles = 30
Note : If a line is dropped from a vertex to its opposite side, it is called as a cevian.
© Rishabh Bidya