Qihangxin classroom junior high school mathematics

My initial idea is ∵OM=4 OH=2, and the angle MHO is 90 degrees, then the angle M=30 degrees. But then you say that point M is the midpoint of arc AB, and OM passes through the center of the circle. According to the vertical diameter theorem of OM⊥AB, the angle ACM is 90 degrees. I don't know, right?

The problem of front, back, up and down position

Why is mathematical induction right? How to prove its correctness?

Come on, math class. So the names of horns tell me and their characteristics.

Elliptic problem of college entrance examination mathematics

Ideological and Political Education in Senior High School Mathematics Curriculum

How much does it cost to write mathematical modeling?

Chatting with a math teacher with excellent thinking.

Special topics on training junior high school mathematics students

Shijingshan High School Ranking and Admission Scores

There are 100 new flowers in the flower shop. Every six flowers can be tied into a bunch, and at most a few flowers can be tied into a bunch.