question_answer

How many triangles are there in the following figures?

A)  29                  

B)  27

C)  23                

D)       30

Correct Answer: B

Solution :

        The triangles are: \[\Delta ABC;\text{ }\Delta ADE;\text{ }\Delta AFH;\text{ }\Delta AIL;\] \[\Delta DFG;\text{ }\Delta DIK;\Delta DBO;\Delta GDE;\] \[\Delta EGH;\text{ }\Delta EJL;\text{ }\Delta EMC;\text{ }\Delta FIJ;\] \[\Delta FBN;\text{ }\Delta JFG\text{ };\text{ }\Delta GJK;\text{ }\Delta KGH;\] \[\Delta HKL;\Delta HNC;\text{ }\Delta NFH;\text{ }\Delta GMO:\] \[\Delta IBM;\text{ }\Delta MU;\text{ }\Delta JMN;\text{ }\Delta NJK;\] \[\Delta KNO;\Delta OKL;\text{ }\Delta LOC;\]