题目
如图,直线AB与CD相交于O,∠EOD=90°,正确填写下列两角关系的名称. ∠1与∠2:______________________________________________________ ∠2与∠3:______________________________________________________ ∠2与∠4:______________________________________________________ ∠1与∠4:______________________________________________________
答案:互为余角 互为补角 对顶角 互为余角