China Naming Network - Ziwei knowledge - 20 18 Liaoyang as shown in the figure, centered at 0 o'clock at the corner mon.
20 18 Liaoyang as shown in the figure, centered at 0 o'clock at the corner mon.
Intercept AG=AE on AC
Because ag = AE ∠ GAF = ∠ EAF =15; AF=AF, so △GAF is all equal to △ △EAF.
So GF=EF
At the same time, ∠ FGC = ∠ AFE = ∠ CFD = 60 can be obtained.
Therefore, since gf = dfCF = CF∠ GCF =∠ DCF = 45, △CGF is equal to △CDF.
So gf = df
Comprehensive available ef = df