多边形分类
Section outline
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::[图1]Monica pulls into a parking lot and sees a blue sign. She quickly recognizes the sign as a polygon , but she can't remember the exact name of the polygon. She stares at the sign for a few seconds then asks her younger sister to identify the shape. What type of polygon should her younger sister use to describe the sign?
::Monica拉到停车场看到一个蓝色的标志。 她很快认出这个标志是一个多边形, 但她记不得这个多边形的确切名称。 她盯着这个标志看几秒钟, 然后叫她的妹妹去辨认形状。 她的妹妹应该用什么类型的多边形来描述这个标志?In this concept, you will learn to classify polygons.
::在此概念中,您将学会对多边形进行分类。Classifying Polygons
::分类多边形A polygon is a simple closed figure formed by three or more segments. A triangle is a polygon and a quadrilateral is a polygon, too. Here are three pictures of polygons.
::多边形是指由三个或三个以上区块构成的简单封闭的图形。三角形是一个多边形,四边形也是一个多边形。这里有三幅多边形图象。There are several different types of polygons.
::有几种不同的多边形。Here is a list of the first eight types of polygons.
::这是前八种多边形的列表 。-
A
triangle
has three sides.
::三角形有三边
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A
quadrilateral
has four sides.
::四方有四面。
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A
pentagon
has five sides.
::五角形有五面
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A
hexagon
has six sides.
::六边形有六面形
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A
heptagon
has seven sides
::七十七方有七面
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An
octagon
has eight sides.
::八角形有八边
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A
nonagon
has nine sides.
::一个非阿贡有九面。
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A
decagon
has ten sides.
::十角形有十边
Examples
::实例Example 1
::例1Earlier, you were given a problem about Monica and the parking sign.
::早些时候,有人给你一个问题 关于莫妮卡和停车牌。She knows that the sign is a polygon, but she can't remember the name. She asks her younger sister. What type of polygon should her younger sister use to describe the shape of the sign?
::她知道这个标志是一个多边形, 但她不记得这个名字。 她问她妹妹。 她妹妹应该用什么样的多边形来描述这个标志的形状?First, count the number of sides.
::首先,计数双方的数目。4
Then, classify the polygon.
::然后对多边形进行分类。Quadrilateral
::四方The answer is a quadrilateral. Her younger sister should describe the shape of the sign as a quadrilateral.
::答案是四边形。她的妹妹应该把标志的形状描述为四边形。Example 2
::例2Classify the polygon that is represented in the picture.
::分类图片中所代表的多边形。First, count the number of sides for the television. Do not count the stand.
::首先, 计数电视的边数。 不要计数证人席 。4
Then, classify the polygon.
::然后对多边形进行分类。Quadrilateral
::四方The answer is that the television is shaped like a quadrilateral.
::答案是电视的形状像四边形Example 3
::例3Classify the polygon that is represented in the picture.
::分类图片中所代表的多边形。First, count the number of sides.
::首先,计数双方的数目。8
Then, classify the polygon.
::然后对多边形进行分类。Octagon
::八角The answer is that a Stop sign is shaped like an octagon.
::答案是停止标志的形状像八角形Example 4
::例4Classify the polygon that is represented in the picture.
::分类图片中所代表的多边形。First, count the number of sides.
::首先,计数双方的数目。5
Then, classify the polygon.
::然后对多边形进行分类。5
The answer is that the Pentagon is shaped like a pentagon.
::答案是五角大楼的形状像五角大楼Example 5
::例5Classify the polygon that is represented in the picture.
::分类图片中所代表的多边形。First, count the number of sides for one of the shapes.
::首先,计算一个形状的边数 。6
Then, classify the polygon.
::然后对多边形进行分类。Hexagon
::六边形The answer is a hexagon.
::答案是六边形Review
::回顾Determine whether or not each image is a polygon. If yes, write polygon, if no, explain why not.
::确定每个图像是否是一个多边形。 如果是,请写入多边形,如果不是,请解释为什么不是。-
::[图15] -
::[图16] -
::[图17] -
::[图18] -
::[图19] -
::[图20] -
::[图21] -
A square tile on a floor
::地板上的平方瓷砖
Review (Answers)
::回顾(答复)Click to see the answer key or go to the Table of Contents and click on the Answer Key under the 'Other Versions' option.
::单击可查看答题键, 或转到目录中, 单击“ 其他版本” 选项下的答题键 。Resources
::资源
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A
triangle
has three sides.