1, the class I took won the advanced class collective in Wuhan for many times, won the special prize of the quality class competition in Jiang 'an District, was an excellent coach in the Olympic Mathematics Competition, and was the third-grade director who made outstanding contributions to the quality of the senior high school entrance examination in Jiang 'an District in 20 18.
2. He is an experienced and excellent class teacher in Guangya, No.2 Middle School. He manages students strictly with love, is humorous and has an active classroom atmosphere, and is deeply loved by students and parents.
Difficulties: How to determine the point M? Because the side lengths of the left right-angled triangle are 3, 4 and 5 respectively