How many triangles are there altogether in the given figure ?

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Solution

The correct option is B 15
Triangles are : $T_{1}, T_{2}, T_{3}, T_{4}, T_{5}; T_{1} T_{2}, T_{2} T_{3}, T_{3} T_{4}$ ,
$T_{4} T_{5}; T_{1} T_{2} T_{3}, T_{2} T_{3} T_{4}, T_{3} T_{4} T_{5};$
$T_{1} T_{2} T_{3} T_{4}, T_{2} T_{3} T_{4} T_{5}, T_{1} T_{2} T_{3} T_{4} T_{5}$

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