23.在△ABC中.∠ACB=90°.AC=BC.直線MN經(jīng)過(guò)點(diǎn)C.且AD⊥MN于D.BE⊥MN于E.當(dāng)直線MN繞點(diǎn)C旋轉(zhuǎn)到圖1的位置時(shí).易證:DE=AD+BE 查看更多

 

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(本題滿分14分,第(1)小題滿分4分,第(2)、(3)小題滿分各5分)在Rt△ABC中,∠ACB=90°,BC=30,AB=50.點(diǎn)PAB邊上任意一點(diǎn),直線PEAB,與邊ACBC相交于E.點(diǎn)M在線段AP上,點(diǎn)N在線段BP上,EMEN

(1)如圖1,當(dāng)點(diǎn)E與點(diǎn)C重合時(shí),求CM的長(zhǎng);

(2)如圖2,當(dāng)點(diǎn)E在邊AC上時(shí),點(diǎn)E不與點(diǎn)A、C重合,設(shè)APx,BNy,求y關(guān)于x的函數(shù)關(guān)系式,并寫出函數(shù)的定義域;

(3)若△AME∽△ENB(△AME的頂點(diǎn)A、M、E分別與△ENB的頂點(diǎn)E、NB對(duì)應(yīng)),求AP的長(zhǎng).

 

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(本題滿分14分,第(1)小題滿分4分,第(2)、(3)小題滿分各5分)在Rt△ABC中,∠ACB=90°,BC=30,AB=50.點(diǎn)PAB邊上任意一點(diǎn),直線PEAB,與邊ACBC相交于E.點(diǎn)M在線段AP上,點(diǎn)N在線段BP上,EMEN,

(1)如圖1,當(dāng)點(diǎn)E與點(diǎn)C重合時(shí),求CM的長(zhǎng);

(2)如圖2,當(dāng)點(diǎn)E在邊AC上時(shí),點(diǎn)E不與點(diǎn)A、C重合,設(shè)APx,BNy,求y關(guān)于x的函數(shù)關(guān)系式,并寫出函數(shù)的定義域;

(3)若△AME∽△ENB(△AME的頂點(diǎn)A、M、E分別與△ENB的頂點(diǎn)EN、B對(duì)應(yīng)),求AP的長(zhǎng).

 

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(本題滿分14分,第(1)小題滿分4分,第(2)、(3)小題滿分各5分)在Rt△ABC中,∠ACB=90°,BC=30,AB=50.點(diǎn)PAB邊上任意一點(diǎn),直線PEAB,與邊ACBC相交于E.點(diǎn)M在線段AP上,點(diǎn)N在線段BP上,EMEN,
(1)如圖1,當(dāng)點(diǎn)E與點(diǎn)C重合時(shí),求CM的長(zhǎng);
(2)如圖2,當(dāng)點(diǎn)E在邊AC上時(shí),點(diǎn)E不與點(diǎn)AC重合,設(shè)APxBNy,求y關(guān)于x的函數(shù)關(guān)系式,并寫出函數(shù)的定義域;
(3)若△AME∽△ENB(△AME的頂點(diǎn)AM、E分別與△ENB的頂點(diǎn)E、NB對(duì)應(yīng)),求AP的長(zhǎng).

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(本題滿分14分,第(1)小題滿分4分,第(2)、(3)小題滿分各5分)在Rt△ABC中,∠ACB=90°,BC=30,AB=50.點(diǎn)PAB邊上任意一點(diǎn),直線PEAB,與邊ACBC相交于E.點(diǎn)M在線段AP上,點(diǎn)N在線段BP上,EMEN,
(1)如圖1,當(dāng)點(diǎn)E與點(diǎn)C重合時(shí),求CM的長(zhǎng);
(2)如圖2,當(dāng)點(diǎn)E在邊AC上時(shí),點(diǎn)E不與點(diǎn)A、C重合,設(shè)APx,BNy,求y關(guān)于x的函數(shù)關(guān)系式,并寫出函數(shù)的定義域;
(3)若△AME∽△ENB(△AME的頂點(diǎn)A、M、E分別與△ENB的頂點(diǎn)EN、B對(duì)應(yīng)),求AP長(zhǎng).

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(本題滿分14分,第(1)小題滿分4分,第(2)、(3)小題滿分各5分)在Rt△ABC中,∠ACB=90°,BC=30,AB=50.點(diǎn)PAB邊上任意一點(diǎn),直線PEAB,與邊ACBC相交于E.點(diǎn)M在線段AP上,點(diǎn)N在線段BP上,EMEN,

(1)如圖1,當(dāng)點(diǎn)E與點(diǎn)C重合時(shí),求CM的長(zhǎng);

(2)如圖2,當(dāng)點(diǎn)E在邊AC上時(shí),點(diǎn)E不與點(diǎn)A、C重合,設(shè)APxBNy,求y關(guān)于x的函數(shù)關(guān)系式,并寫出函數(shù)的定義域;

(3)若△AME∽△ENB(△AME的頂點(diǎn)A、ME分別與△ENB的頂點(diǎn)E、NB對(duì)應(yīng)),求AP的長(zhǎng).

 

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