我们知道三角形面积的计算公式为S=1/2ah,其中a表示底,h表示高,于是很容易推出下面的结论: (1)等底(同底)等高(同高)的两个三角形面积相等: (2)等高的两个三角形面积的比等于其底的比,等底的两个三角形面积的比等于其高的比. 这两个结论在三角形面积的计算中往往非常有用,下面举例说明. We know that the formula for calculating the area of ​​the triangle is S=1/2ah, where a represents the bottom and h represents the height, so it is easy to introduce the following conclusions: (1) Two triangles of the same height (the same height) as the bottom (the same bottom) The area is equal: (2) The ratio of the two triangle areas of equal height equals the ratio of their bottoms, and the ratio of the area of ​​two equal triangles equals the ratio of their heights. These two conclusions are often very useful in the calculation of the area of ​​a triangle. Here is an example.