Current location - Training Enrollment Network - Mathematics courses - Senior one math problem, senior one, look at the answer points and enlarge the answer.
Senior one math problem, senior one, look at the answer points and enlarge the answer.
Solution:

∠∠AOC+∠COE =∠AOE = 180

OB is the bisector of ∠AOC and OD is the bisector of ∠COE.

∴∠BOC+∠COD=(∠AOC+∠COE)/2=90

∠∠COD:∠BOC = 2:3

∴∠BOC=90 ×3/(2+3)=54

∴∠COD=90 -54 =36

Related articles
  • Where is there a primary school mathematics tutorial class in Huainan?
  • A small mathematical problem: which triangle has the same side as the regular octagon in the triangle formed by connecting three vertices of the regular octagon? A.
  • Is a+b=b+a an equation?
  • Knowledge structure framework of compulsory two in senior high school mathematics
  • What questions and scores are there in the senior high school entrance examination in Guangdong from junior high school to junior high school?
  • What does "digital reading and writing" mean in math homework?
  • What departments does Jilin University of Finance and Economics have?
  • Which layers of exercises are suitable for mathematics classroom teaching?
  • What is the initial phase angle range of simple harmonic vibration?
  • China's Mathematical Remainder Theorem

    • copyright 2024 Training Enrollment Network All rights reserved