初一语文题:关于命题与定理的关系的问题
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/13 10:47:02
解题思路: ∵ OD平分∠BOC,OE平分∠AOC ∴ ∠AOE = ∠EOC , ∠COD = ∠DOB ∠AOB = 60° = ∠AOE + ∠EOC + ∠COD + ∠DOB = 2*∠EOC + 2*∠COD = 2*∠EOD ∴∠EOD = 60° / 2 = 30°
解题过程:
解:∵ OD平分∠BOC,OE平分∠AOC
∴ ∠AOE = ∠EOC , ∠COD = ∠DOB
∠AOB = 60° = ∠AOE + ∠EOC + ∠COD + ∠DOB = 2*∠EOC + 2*∠COD = 2*∠EOD
∴∠EOD = 60° / 2 = 30°
解题过程:
解:∵ OD平分∠BOC,OE平分∠AOC
∴ ∠AOE = ∠EOC , ∠COD = ∠DOB
∠AOB = 60° = ∠AOE + ∠EOC + ∠COD + ∠DOB = 2*∠EOC + 2*∠COD = 2*∠EOD
∴∠EOD = 60° / 2 = 30°