24.
(2023九上·長春月考)
如圖,在△ABC中,tanB=
, ∠C=45°,AD=6,AD⊥BC于點(diǎn)D,動點(diǎn)E從點(diǎn)D出發(fā)沿DB向點(diǎn)B以每秒1個(gè)單位長度的速度運(yùn)動,將線段DE繞點(diǎn)D順時(shí)針旋轉(zhuǎn)90°,得到線段DF,過點(diǎn)F作FG∥AC,交射線DC于點(diǎn)G.以EC、FC為鄰邊
EGFP.
EGFP與△ABC重疊部分面積為S.當(dāng)點(diǎn)E與點(diǎn)B重合時(shí)停止運(yùn)動,設(shè)點(diǎn)E的運(yùn)動時(shí)間為t秒(t>0) .