____________( )
____________( )
∴ △ABO≌△DCO ( )
2、 如图②,根据所给的条件,说明△ACB≌△ADB.
解:在△ACB和△DCO中
∵ _____ ______( )
_______ _____( )
∴ △ABO≌△ADB ( )
课堂练习
1、如图(1)所示根据SAS,如果AB=AC, = ,即可判定ΔABD≌ΔACE.
(1) (3) (4)