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近年来,全国卷中关于面积的考查从未停止,主要原因是面积问题较为常见,思维量不大,但对考生运算能力的要求不低,部分问题与平面几何、三角函数、极坐标及参数方程有关,有较好的区分度.例1(2016年高考全国新课标卷一理科卷第20题)设圆x~2+y~2+2x-15=0的圆心为A,直线l过点B(1,0)且与x轴不重合,l交圆A于C,D两点,过B作AC的平行线交AD于点E.
In recent years, the test of the area in the whole country has never ceased. The main reason is that the area problem is more common and the amount of thinking is not big, but the requirement for the ability of the examinee is not low. Some problems are related to plane geometry, trigonometry, polar coordinates and parameters Equations, there is a better degree of differentiation.Example 1 (2016 college entrance examination of the new curriculum standard volume 20) set the circle x ~ 2 + y ~ 2 + 2x-15 = 0 center of the circle A, a straight line l A point B (1,0) and does not coincide with the x-axis, l cross the circle A in C, D two points, B for AC parallel lines to pay AD at point E.