Question

How to do this comebody help me

Answer 1

`\Delta FGH\sim\Delta LMN`, so corresponding sides occur in some ratio with one another. In particular, the order the vertices tells you that

`(FG)/(LM)=(GH)/(MN)=(HF)/(NL)`

`\implies(FG)/(14)=(54)/(12)`

`\implies FG=(14\cdot54)/(12)=63`