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解直角三角形是《数学课程标准》中“图形与几何”领域的重要内容。主要研究锐角三角函数和解直角三角形。锐角三角函数为解直角三角形提供了有效的工具,解直角三形在实际中有着广泛的应用。解直角三角形主要研究三角形中边、角之间的比例关系,它与“相似三角形”、“勾股定理”有着密切的联系,同时也是高中数学学习三角函数的衔接点。纵观近几年来各省中考题,
Solution Right-angled triangle is an important part in the field of “graphics and geometry” in Mathematics Course Standard. The main research triangle trigonometric triangle function and solution. Sharp-angle trigonometric functions provide an effective tool for solving right-angle triangles. The solution of right-angled triangles is widely used in practice. Solution of right triangle mainly study the proportion of the triangle in the side, the angle between the relationship with the “Similar Triangle”, “Pythagorean Theorem” is closely linked, but also high school mathematics learning trigonometry convergence point. Throughout the province in recent years in the examination questions,