Question

How many triangles are there in the figure?
(it is a 'Cevian' write formula of a triangle named in honour of Mathematician Ceva)

Answer 1

$No.oftraingles=1\times 1+2\times 2+3\times 3+4\times 4+5\times 3+6\times 2+7\times 1$

$=1+4+9+16+15+12+7$

$=64$

Hence, the total number of triangles in the given figure is $64$