走进商场,你看到的是琳琅满目的商品;走在街道上,满眼是鳞次栉比的高楼大厦;走在风景区,到处是造型各异的人工或者自然景物……其实,你所看到的这个丰富多彩的世界就是一些不同的图形组合而成!不信,我们一起来认识一下我们身边的这个图形世界吧!我们已经熟悉的常见的平面图形有如图1所示的线(直线、线段、射线、曲线等)、三角形、长方形、梯形、六边形、圆 Into the mall, you see an array of goods; walking in the streets, eye-catching rows of tall buildings; walk in the scenic area, full of artificial or natural scenery of different shapes ... ... In fact, you see this The colorful world is a combination of different graphics! Do not believe, let’s get acquainted with this world of graphics around us! The familiar flat graphics we already know have lines (lines, lines, rays, Curve, etc.), triangle, rectangle, trapezoid, hexagon, circle