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正午太阳高度角的计算与分布规律是许多高中生认为非常难以学习的地理知识。在平时的解题过程中,很多学生常常会忘记正午太阳高度角的求解公式,就算勉强记住公式有时也会混淆加法和减法的运用。本文利用三角形的内角度数可以很好地解决这一难题,其原理是直角三角形两锐角和为90°。一、简化经纬网图图1是学生常见的经纬网图。我们可把图1简化为图2,再把图2经线拉直形成图3,即可以用作“三角形法”的纬度图。
The calculation and distribution of solar elevation at noon is the geographical knowledge that many high school students find it very difficult to learn. In the usual problem-solving process, many students often forget the formula for calculating the solar elevation at midday, even if the reluctance to remember the formula can sometimes confuse the use of addition and subtraction. In this paper, the use of the number of triangular angle can be a good solution to this problem, the principle is that the right triangle and two acute angles of 90 °. First, simplify the latitude and longitude network Figure 1 is a common latitude and longitude network diagram. We can simplify Figure 1 to Figure 2, and then straighten the warp of Figure 2 to form Figure 3, which can be used as the latitude map of the “triangle method.”