2021年贵州中考数学模拟试题全卷解答
先把全卷2个相对有一定难度的题挑出来看看,一个是最后一道二次函数压轴题中第(3)问,常规考查抛物线中动点平行四边形存在性问题,理解和掌握了我的方法,可轻松解决所有特殊四边形,无论是平行四边形、菱形、矩形还是正方形,都可迎刃而解,不漏动点,不用画草图,简单高效。
另一个就是24题几何压轴题中第3问,当OP取何值时,无论M点位置如何,均满足ON=QP,显然常规采用设参数,证明当OP取某个值时,始终有ON=QP,其实就是构造和证明全等三角形的办法。
其他,选择题没有一道有点难度的题。填空题有道摆在卷面的将军饮马模型求线段和最值问题。20题、23题虽没有难度,但需转换几次勾股定理或相似三角形,在该卷中算是中等难度吧。
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