How many triangles are there in the given figure?

18 20 10 12

20

The logic followed here is; (let's keep in mind the base, means how many triangles are there in the base) 1+2= 03  (ANC)  1+2= 03  (BTD) And, the other triangles are; ANP, PNO, PTO, PTB, MTD, CNL, PNT, ACP, PDB, PCD, BMD, ACL, PQD, PQC Therefore, there are 03+03+14= 20 triangles in the above figure.