How many number of TRIANGLES in the following figure :
Answer & explanation
Correct answer: option 3
The logic followed here is;
01+02= 03 (AOB)
01+02= 03 (DOC)
01+02= 03 (AOD)
01+02= 03 (BOC)
01+02= 03 (BEC)
And, the other triangles are;
ABD, CBD, ABC, ADC, BOE, COE
Therefore, 03+03+03+03+03+06= 21 triangles