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在解析几何中,定点用直角坐标表示,动点的轨迹用动点的直角坐标间相互制约、相互依存的关系(即方程)表示,为我们用代数方法解决几何问题铺平了道路.这种代数方法,我们通常称之为“坐标法”.在人教A版教材中,对坐标法“三步曲”给出了明确的诠释,即首先建立适当坐标系,用坐标和方程表示几何元素;再通过运算解决代数问题;最后把运算结果“翻译”成几何结论 .“三步曲”的确立,为解析几何问题算法的制定提供了
In analytic geometry, the fixed point is expressed in Cartesian coordinates, and the trajectory of the moving point is constrained and interdependent (ie, equation) in Cartesian coordinates of the moving point, which paves the way for solving the geometric problem algebraically Algebra method, we usually call “coordinate method ” in the teaching of A textbook, the coordinate method “trilogy ” gives a clear interpretation, that is, first of all to establish the appropriate coordinate system, with coordinates and The equations represent the geometric elements; then the algebraic problem is solved by the operation; finally, the calculation result “translation ” is formed into a geometric conclusion. The establishment of “trilogy” provides the algorithm for resolving geometric problems