Non Verbal Reasoning - Analytical Reasoning - Discussion

Discussion Forum : Analytical Reasoning - Section 1 (Q.No. 4)
4.

Find the number of triangles in the given figure.

12
18
22
26
Answer: Option
Explanation:

The figure may be labelled as shown.

The simplest triangles are AHB, GHI, BJC, GFE, GIE, IJE, CEJ and CDE i.e. 8 in number.

The triangles composed of two components each are HEG, BEC, HBE, JGE and ICE i.e. 5 in number.

The triangles composed of three components each are FHE, GCE and BED i.e. 3 in number.

There is only one triangle i.e. AGC composed of four components.

There is only one triangle i.e. AFD composed of nine components.

Thus, there are 8 + 5 + 3 + 1 + 1 = 18 triangles in the given figure.

Discussion:
32 comments Page 2 of 4.

Prakash said:   1 decade ago
Is there any shortcut for these problems to solve?
(1)

Ishan said:   1 decade ago
Is there any technique available to solve this problem using permutation and combination method?if its there then such type of problem can be easily solve.
(1)

Aditya raj said:   1 decade ago
Any shortcut method for count this figure triangle?
(1)

Deepak singh said:   1 decade ago
Is there any short tricks for these type of problems?, please tell me.
(1)

SIRAJ said:   1 decade ago
Is there any short tricks for these type of problems?
(1)

Sri said:   1 decade ago
Is there any shortcut for counting number of triangle?
(1)

Midhun Kumar said:   1 decade ago
No short cuts are available till now, we have to solve by ourselves.
(1)

Prathap said:   1 decade ago
These kind of problems are a kind of dynamic ones hence dealing with formulae can't happen at ease.
(1)

Pawan said:   1 decade ago
Tell the time saving trick, the above process is time consuming.

Shashikant kumar said:   1 decade ago
The figure shows a triangle with many lines. If the number of internal lines from vertex E=4, and the number of internal lines parallel to base is 2, then [4 X 2 X (2+1)]/2 = 12 and then add the rest small triangle at side and the main large triangle, you will get 18.


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