1. Use the formula method directly.

For the area of triangle or special quadrangle, the area formula can be directly used to solve it.

2. Sum-and-difference method: it is a method to find a graphic area by using the sum or difference of the areas of some graphics.

3. Area ratio method: the area ratio of two equal-base (or equal-height) triangles is equal to the corresponding height (or base) ratio.

4. Segmentation method: divide a graph into several parts with easy area calculation, calculate the area of each part, and then calculate the area of the original graph.

5. Complement method: Find the area of irregular figure, make it into a page diagram, and find the area of original figure with the area of special figure.

6. Cut-and-fill method: Cut a part of the figure and fill it in another proper position to find out the area of the deformed figure, and then find out the area of the original figure. In fact, the method and flexibility of calculating the area are very suitable for the topic. For example, when calculating the trapezoidal area, the sum of the two bottoms can be calculated by translating the diagonal or making two high lines to transfer the sum of the two bottoms to the same bottom to calculate the sum of the line segments, thus transforming the trapezoidal problem into a rectangle, a right triangle, a parallelogram and other problems, which is beneficial to solving problems.

Hehe, there are so many ways. Generally speaking, you should be good at summarizing in the process of doing problems, and you must know this kind of problems when doing problems. It's best to draw inferences from others. I wish you good grades in the next exam.