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小网格，大舞台——在网格中作图和求角

Author(s)：
陆院

Publication Title：

Wen Yuan (Middle School Edition) 2021 No.07

Affiliations：
浙江省东阳市外国语学校，浙江东阳 322100

Abstract：
网格是数学学习的常用工具，它在图形的变换、求角或三角函数等问题中有着广泛的作用。数学课表中，关于几何作图，有两种方法——尺规作图和网格作图。尺规作图在课表中有明确要求，大家也都很熟悉。而网格作图却没有，因此很多老师往往不能很好地把握它的教学尺度。纵观近几年数学中考，网格问题频繁出现在各地区的中考卷中。本文就以中考题为例，探讨在网格中作图和求角或角的三角函数值，感受小小网格在我们数学问题中发挥的作用。

Keywords：
网格；K型相似；直角三角形

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[1] 陆院.小网格，大舞台——在网格中作图和求角[J].Wen Yuan (Middle School Edition),2021(07),.

文渊(中学版)

Wen Yuan (Middle School Edition)

Language: 中文

CN：11-9275/G

ISSN：2096-627X

Publication Frequency: 月刊

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