25.如圖1,在?ABCD中,對(duì)角線BD平分∠ABC,過(guò)點(diǎn)B作BE⊥AD交DA的延長(zhǎng)線于點(diǎn)E,F(xiàn)是AE的中點(diǎn),連接EF.
(1)若BD=5,BE=3,求EF的長(zhǎng).
(2)如圖2,G是BD的中點(diǎn),N,M分別是EF,AD上一點(diǎn),連接GN,GM.若∠BAD=∠NGM,求證:BC=EN+AM.
(3)如圖3,K是BC上一點(diǎn),P是邊AB上一動(dòng)點(diǎn),連接EP.將△BEP沿EP翻折,使點(diǎn)B落在平面內(nèi)點(diǎn)Q處,連接DQ,KQ.若AD=6,CK=2,∠C=120°,請(qǐng)直接寫出當(dāng)3KQ+
DQ取最小值時(shí),點(diǎn)B到QK的距離.