作AM⊥BC于点M,DN⊥BC于点N
∵AB:AC:BC=根号2:根号2:2
∴AB²+AC²=BC²
∴△ABC是等腰直角三角形
∴AM=1/2BC,∠ACB =45°
∵AD‖BC ,DN⊥BC
∴AM=DN
∵BD=BC
∴DN=1/2BC=1/2BD
∴∠CBD =30°
∵BD =BC
∴∠BDC =75°
∵∠CED=∠BCA+∠CBE=45°+30°=75°
∴∠CDE =∠CED
∴CD=CE
作AM⊥BC于点M,DN⊥BC于点N
∵AB:AC:BC=根号2:根号2:2
∴AB²+AC²=BC²
∴△ABC是等腰直角三角形
∴AM=1/2BC,∠ACB =45°
∵AD‖BC ,DN⊥BC
∴AM=DN
∵BD=BC
∴DN=1/2BC=1/2BD
∴∠CBD =30°
∵BD =BC
∴∠BDC =75°
∵∠CED=∠BCA+∠CBE=45°+30°=75°
∴∠CDE =∠CED
∴CD=CE