在正方形网格中,我们把水平线与竖直线相交的点称为格点.如果在网格中,一个三角形的三个顶点在格点上,那么我们称这个三角形为格点三角形.格点三角形有锐角三角形,直角三角形和钝角三角形三类.在初中阶段,锐角三角函数值的求解经常作为一个考点,来考查学生的观察、分析和计算能力.由于此类题灵活多变,内容丰富,不仅宁夏回族自治区,乃至全国其他省市自治区直辖市经常将其在中考试卷中作为考点进行考查,其考查学生能力的作用不言而 In a square grid, we call a point where the horizontal line intersects with the vertical line as a grid point. If the three vertices of a triangle are on the grid point in a grid, then we call this triangle a grid of triangles. Triangle has acute triangle, right triangle and obtuse triangle.In the junior high school, the solution of acute trigonometric function is often used as a test site to examine students’ abilities of observation, analysis and calculation.Because of such flexible and versatile content, Not only Ningxia Hui Autonomous Region, but also other provinces, autonomous regions and municipalities directly under the Central Government regularly examine their examination papers in the middle school exams for examining the function of students’ abilities