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运用解直角三角形知识,不仅能够解直角三角形,而且可以解某些斜三角形.主要途径是通过作高(或垂线),将斜三角形转化为直角三角形,然后运用勾股定理、锐角三角函数等知识进行解答.近几年各地中考都出现了这方面的试题.下面举例说明这类问题的解法.
Applying the knowledge of right-angled triangle can not only solve right-angled triangle, but also solve some oblique triangles. The main approach is to transform the oblique triangle into a right-angled triangle by using high (or vertical) lines, then use the Pythagorean theorem, acute trigonometric function Knowledge to answer.In recent years all over the exam have appeared in this area test questions. The following examples illustrate the solution of such problems.