Question

如图所示，直线AB，CD相交于O，∠DOB＝，∠BOE＝，写出下列各角的关系并求出该角的度数． (1) ∠BOD与∠AOC________，则∠AOC＝________° (2) ∠AOC与∠AOD________，则∠AOD＝________° (3) ∠EOD与∠DOB________，则∠EOD＝________° (4) ∠COE与∠EOD________，则∠COE＝________° (5) 我们还可根据∠AOD与∠COB是________或∠DOB与∠COB________，求出∠COB＝________°

Answer 1

答案：1．是对顶角,40;2．互为邻补角,140;3．互为余角,50;4．互为邻补角,130;5．对顶角,互为邻补角,140;