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surabhi

· started a discussion

· 1 Months ago

wrong counting (Question: 190147.0 )

in (1-11),9 and 8 are not triangles...so if we exclude them..there are 25 triangles

Question:

How many triangles are there in the given figure ?


Options:
A) 17
B) 21
C) 25
D) More than 25
Solution:
Ans: (c) 


There are 25 triangles in the given figure – (1 – 11 except 8 and 9), (2, 3), (3, 4), 

(4, 5), (6, 7), (2, 5), (10, 11), (9, 10), (8,11),  (1, 2, 5), (6, 9, 10), (7, 8, 11), 

(2, 5, 6), (4, 5, 6, 7 ), (2, 5, 6, 7), 

(8, 9, 10, 11) and (2, 3, 4, 5, 6, 7) 

Knowledge Expert

· commented

· 1 Months ago

@sanket singh you right There are 25 triangles in the given figure – (1 – 11 except 8 and 9), (2, 3), (3, 4),
(4, 5), (6, 7), (2, 5), (10, 11), (9, 10), (8,11), (1, 2, 5), (6, 9, 10), (7, 8, 11),
(2, 5, 6), (4, 5, 6, 7 ), (2, 5, 6, 7),
(8, 9, 10, 11) and (2, 3, 4, 5, 6, 7)

sanket singh

· commented

· 1 Months ago

you are right 9 and 8 are not triangles

Knowledge Expert

· commented

· 1 Months ago

see again 1 and 11 are triangles
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