- 問題詳情:如圖,平行四邊形ABCD中,E爲AD的中點,已知△DEF的面積爲S,則四邊形ABCE的面積爲()A.8S B.9S C.10S D.11S【回答】B【解答】解:如圖所示,∵四邊形ABCD是平行四邊形,∴AD∥BC,AD=BC,∴△DEF∽△BCF,∴S△DEF:S△BCF=()2,又∵E是AD中點,∴DE=AD=BC,∴DE:BC=DF:BF=1:2,∴S△DEF:S△B...
- 12702
- 問題詳情:.如圖,在△ABC和△CED中,AB//CD,AB=CE,AC=CD,求*:∠B=∠E.【回答】*:∵AB//CD,∴∠DCA=∠CAB。又∵AB=CE,AC=CD,∴△CAB全等△DCE。∴∠B=∠E.知識點:各地中考題型:解答題...
- 14490