He ____ (dress) more casually if he ____ (not work) on weekends.
如图,在△ABC中,∠C=90°,AB的垂直平分线交AB与D,交BC于E,连接AE,若CE=5,AC=12,则BE的长是( )
P是△ABC所在平面上一点,若PA→·PB→=PB→·PC→=PC→·PA→,则P是△ABC 的( )