Baidu map shows that Anyang Experimental Middle School is located at No.858, North Section of Pingyuan Road, Beiguan District, Anyang City, Henan Province. Anyang No.3 Junior High School, the predecessor of Anyang Experimental Middle School, came into being at the climax of the National First Five-Year Plan. 1958, the city's middle schools were renamed "Anyang No.6 Middle School". 1976 was designated as an "open school" by the city.
Difficulties: How to determine the point M? Because the side lengths of the left right-angled triangle are 3, 4 and 5 respectivel