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- Urgent for the detailed answer process of 20 12 senior high school entrance examination in Daoli District.
Urgent for the detailed answer process of 20 12 senior high school entrance examination in Daoli District.
Let AH⊥BC and EM⊥AD, it is easy to prove that G is on BD, angle CAH= angle GBF, let CH=k, then AH=3k, ∴AB=BC=5k, BH=4k.
∴ Tanard = Tanaabc = 3/4 ÷ Germany = 25/13 ∴ em =15/13, DM=20/ 13, ∫
∴△AFC area = 1/2. CF Ah = 9/2。
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