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空间距离中点到平面的距离是高考考查的重点.求解方法有2种:①直接法:第1步,作图,即先作出表示所求距离的线段;第2步,证明,即证明第一步中所作线段的长就是所要求的距离;第3步,计算,解三角形求出这条线段的长;②间接法:在直接法中,第1步“作图”是关键,但往往有时作图较困难,间
The distance from the midpoint to the plane of the space is the focus of the college entrance examination. There are two kinds of solving methods: 1 Direct method: the first step, mapping, that is, the line segment that represents the desired distance is first made; Step 2, the proof, that is, the proof The length of the line segment made in one step is the required distance; Step 3, calculate, solve the triangle to find the length of this line segment; 2 Indirect method: In the direct method, step 1 “Plotting” is the key, but often Sometimes it’s more difficult to plot.