如图,矩形ABCD中,AB=8,BC=6,P为AD上一点,将△ABP沿BP翻折至△EBP,PE与CD相交于点O,BE与CD相交于点G,且OE=OD,则AP的长为__________.
如图,在四边形ABCD中,AB⊥BC,对角线AC、BD相交于点E,E为BD中点,且AD=BD,AB=2,∠BAC=30°,则DC=_____.
如图,矩形ABCD中,AB=4,AD=3,点Q在对角线AC上,且AQ=AD,连接DQ并延长,与边BC交于点P,则线段AP=_____.
如图,在△ABC中,CE平分∠ACB,CF平分∠ACD,且EF∥BC交AC于M,若CM=3,则CE2+CF2=_____.
如图,在△ABC中,AB=6,D、E分别是AB、AC的中点,点F在DE上,且DF=3FE,当AF⊥BF时,BC的长是_____.
若O是四边形ABCD的对角线AC和BD的交点,且OB=OD,AC=14cm,则当OA=_____cm时,四边形ABCD是平行四边形.