[Math] analytic approach

唔清楚analytic approach點用，可唔可以簡略解釋一下? 即係可以用咩方法去prove，邊D方法就唔得?


例如下面果2條咁，要點做? 題目無圖，需要自己畫出黎?

1. By the analytic approach, prove that if a line passes through the mid-point of one side of a triangle and is parallel to another side, it bisects the third side of the triangle.


2. By the analytic approach, prove that the line segments oining the mid-points of opposite sides of any quadrilateral bisect each other.