首先考虑图1三角形的个数,
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/cefc1e178a82b90142990e82708da9773912ef4f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
三角形有:△AFO,△AFC,BFO,△BFC,△ABO,△BDO,△BDA,△CDO,△CDA,△BCO,△CEO,△CEB,△AEO.AEB,△ACO,△ABC共16个三角形,
连接EF后如图2,三角形有:△AGE,△AGF,△FGO,△GOE,△EFB,△EFA,△EFC,△EFO共8个,
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/060828381f30e92499745e804f086e061c95f7ab?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
连接DF后,如图3,三角形有:△BFH,△FOH,△BHD,△HOD,△FOE,△BDF,△DFG,△FDC,共8个,
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/03087bf40ad162d9d93ea0ad12dfa9ec8b13cdab?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
连接DE后,如图4,三角形有:△EIC、△DIC、△EIC、△OID、△OEC、△ODC、△EIF、△IFD、△ADE、△DEF、△BDE、△DCE,共12个,
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/622762d0f703918f9401ff7b523d269758eec4ab?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
综上共有三角形16+8+8+12=44个.
答:一共有44个三角形.