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sanjual bobbal

· started a discussion

· 1 Months ago

Issue (Question: 186220.0 )

Give the trick pls

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

SAURABH YADU

· commented

· 1 Months ago

I think it should be 19 (an odd no). Since the figure is symmetrical about the middle line and the whole fig. is enclosed in a triangle only.
on counting also I got 19 triangles as an answer.
please correct my logic.

Knowledge Expert

· commented

· 1 Months ago

Dear Student,

There is no formula for the triangle counting in shapes.

So for the triangle question its best to count and check, but you count this in a sequence for more accuracy.

Start counting from the single parts how many triangle are formed, then joining two parts count how many triangles are formed, the same way apply continued.

From this you will find triangles in any shape very easy.

Hope you have a great learning with us!!

All the Best,
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