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关于解直角三角形的中考应用题,有两类常见图形,如图1,2.其中都有两个直角三角形,且都有一条公共直角边(一般需要作辅助线得到),不同点是图1中的两个直角三角形位在公共边的同侧,图2中的两个直角三角形位在公共边的两侧.例1如图3,某校数学兴趣小组为测量校园里旗杆AB的高度,在操场的平地上选择一点C,测得旗杆顶端A的仰角为30°,再向旗杆的方向前进16米,到达点D处(C,
There are two types of common graphics, such as Figure 1 and 2. There are two right-angled triangles, and have a common right-angled edge (usually need to make the auxiliary line to get), the difference is Figure 1 Two of the right-angled triangles are on the same side of the common side, and two of the right-angled triangles in Figure 2 are on either side of the common side.Example 1 As shown in Figure 3, a school mathematics interest group measures the height of the flagpole AB on campus, Select a point C on the ground of the playground and measure the elevation angle of the top of the flagpole to 30 ° and then to the flagpole direction of 16 meters to reach the point D (C,