Question 13

How many triangles are there in the following figure.

Solution

If figure is in shape of square and two diagonals are there then total numer of triangles is always 8

So, ABCD and CBFG have 8 and 8 triangles means total 16 triangles.

Now, Remaining triangles = BIJ, IJF, BJF, DBG, ACF

Total number of triangles = 8 + 8 + 5 = 21.

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