是希望杯的23.As in right figure,in a quadrilateral ABCD,we have its diagonal AC bisects DAB,and AB=21,AD=9,BC=DC=10,then the distancefrom point C to line AB is ,and the length of AC is .(英汉词典:quadrilateral 四边形;bisect
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![是希望杯的23.As in right figure,in a quadrilateral ABCD,we have its diagonal AC bisects DAB,and AB=21,AD=9,BC=DC=10,then the distancefrom point C to line AB is ,and the length of AC is .(英汉词典:quadrilateral 四边形;bisect](/uploads/image/z/2081850-42-0.jpg?t=%E6%98%AF%E5%B8%8C%E6%9C%9B%E6%9D%AF%E7%9A%8423.As+in+right+figure%2Cin+a+quadrilateral+ABCD%2Cwe+have+its+diagonal+AC+bisects+%26%2361648%3BDAB%2Cand+AB%3D21%2CAD%3D9%2CBC%3DDC%3D10%2Cthen+the+distancefrom+point+C+to+line+AB+is+%2Cand+the+length+of+AC+is+.%28%E8%8B%B1%E6%B1%89%E8%AF%8D%E5%85%B8%EF%BC%9Aquadrilateral+%E5%9B%9B%E8%BE%B9%E5%BD%A2%EF%BC%9Bbisect)
是希望杯的23.As in right figure,in a quadrilateral ABCD,we have its diagonal AC bisects DAB,and AB=21,AD=9,BC=DC=10,then the distancefrom point C to line AB is ,and the length of AC is .(英汉词典:quadrilateral 四边形;bisect
是希望杯的
23.As in right figure,in a quadrilateral ABCD,we have its diagonal AC
bisects DAB,and AB=21,AD=9,BC=DC=10,then the distance
from point C to line AB is ,and the length of AC is .
(英汉词典:quadrilateral 四边形;bisect 平分)
是希望杯的23.As in right figure,in a quadrilateral ABCD,we have its diagonal AC bisects DAB,and AB=21,AD=9,BC=DC=10,then the distancefrom point C to line AB is ,and the length of AC is .(英汉词典:quadrilateral 四边形;bisect
过C作CE垂直于AD延长线,CF垂直于AB,易证三角形CED全等于三角形CFB,三角形CAD全等于三角形CAF,设BF=X,则DE=X,所以可得方程21-X=9+X,解得X=6.由勾股定理可求,CE=CF=8,AC=17,即from point C to line AB is 8,and the length of AC is 17
过C作CE垂直于AD延长线,CF垂直于AB
由AC平分角DAB,易证三角形CEA全等于三角形CDB,得CF=CE
进而的三角形CED全等于三角形CFB,设BF=X,则DE=X,所以可得方程21-X=9+X,解得X=6。由勾股定理可求,CE=CF=8,AC=17,即from point C to line AB is 8,and the length of AC is 17 <...
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过C作CE垂直于AD延长线,CF垂直于AB
由AC平分角DAB,易证三角形CEA全等于三角形CDB,得CF=CE
进而的三角形CED全等于三角形CFB,设BF=X,则DE=X,所以可得方程21-X=9+X,解得X=6。由勾股定理可求,CE=CF=8,AC=17,即from point C to line AB is 8,and the length of AC is 17
一楼有几处三角形三个点写错了!!很明显"三角形CAD全等于三角形CAF"是错的
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