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SACHIN SAURAV

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· 1 Months ago

Do we need to count the no. of triangles everytime for this kind of problem ? or is there anyother trick for this kind of problem ?

Question:
How many triangles are there in this figure ?


Options:
A) 18
B) 13
C) 9
D) None of these
Solution:
Ans: (a)


Triangles are:  ABC,ABD,ADC,BEG,BGD,DGH,DEB,DCI,DHI,AHC,DHC,ABH,BHD,ADF,ADE,BHC,CFI and FDC

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