如图,△ABC中,∠C=90°,AC=BC,AD平分∠CAB交BC于D,DE⊥AB于E,且AB=8cm,则△DEB的周长是(  )

2024-11-29 04:05:25
推荐回答(1个)
回答1:

∵AD平分∠CAB,∠C=90°,DE⊥AB,
∴CD=DE,
∴AC=AE,
∴△DEB的周长=BD+DE+BE,
=BD+CD+BE,
=BC+BE,
=AC+BE,
=AE+BE,
=AB,
∵AB=8cm,
∴△DEB的周长是8cm.
故选B.