निम्नलिखित आकृति में कितने त्रिभुज है ?

Options

A. 18
B. 13
C. 9
D. 5

Answer

A

Explanation

त्रिभुज इस प्रकार है
`triangle BFG: triangle BGE: triangle BFE: triangle BHE:`
`triangle BHA: triangle GEH: triangle BFE: triangle IHE:`
`triangle CIE: triangle CID: triangle CHE: triangle CAE:`
`triangle CDE: triangle HBC: triangle AED: triangle AEB:`
`triangle BHA: triangle AEF: triangle GEH: triangle IHE:`
`triangle CIE: triangle CID: triangle CHE: triangle CAH:`
`triangle CDE: triangle HBC: triangle AED: triangle AEB:`
`triangle AEC: triangle ABC:`