Question

Comet1221

求解🙏
答案2√22

C
13. 如右圖,一圓交一正△ABC 於D、E、F、G、H、I六點,若CF=1,FG=13,
AG =2,HI =7,試求 DE
a
E

3,
5
9.
64.64.1:8
2-tpeppecte
A. 6
E60