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1.过点D作垂线交AM于点E
因为BC=32,链此且BD:CD=9:7
所以CD=18
又因为∠山唤拍C=∠DEA=90
∠CAD=∠EAD
所以△CAD全等于△EAD
所以ED=CD=18
2.相等
利用边边角定理
可以知道第三边所以对应的角的那两个个直角三角形全等
3.因为:△DEF全等逗羡于△MNP
所以∠D=∠M=48° ∠E=∠N=52°
DE=MN=12cm
三角形内角和定理求出∠P=180°-52°-48°=80°