Olympiad Classics: Five Basic Models (Example 1)

2022-07-20 0 By

Hello everyone, today, the teacher brought a basic exercise of the base height model.This one is pretty basic.As shown in the figure, the area of rectangle ABCD is 36 square centimeters, M is on the side of AD, N is on the side of AB, AM = 1/3AD, AN = 1/3AB, find the area of the shaded part.For this problem, we can directly use the base height model to solve the problem.There are basically two ways.You can divide the shaded area into two triangles and calculate the result directly.You can also calculate the area of the blank part first, and then subtract two blank parts from the area of the rectangle.The final result should be 22 square centimeters!