1、a plane figure bounded by two radii and the included arc of a circle
由兩個(gè)半徑和兩個(gè)半徑中間的弧所形成的一個(gè)平面形狀。

2、A four-sided plane figure with four right angles
矩形，長(zhǎng)方形具有四個(gè)邊的方形，有四個(gè)直角

3、A four-sided plane figure with opposite sides parallel
平行四邊形一種有四條邊且每?jī)蓷l邊對(duì)應(yīng)平行的平面圖形

4、a plane figure with 5 or more points; often used as an emblem.
有五個(gè)或更多的頂點(diǎn)的平面形狀；經(jīng)常用于徽章。

5、a plane figure bounded by two radii and the included arc of a circle.
由兩個(gè)半徑和兩個(gè)半徑中間的弧所形成的一個(gè)平面形狀。

6、A closed plane figure bounded by three or more line segments
多邊形；多角形由三條或更多的線段圍成的一個(gè)封閉的平面圖形

7、a plane figure that deviates from a square or circle due to elongation.
由于延長(zhǎng)而偏離正方形或圓圈的平面形狀。

8、A closed plane figure bounded by three or more line segments.
多邊形；多角形由三條或更多的線段圍成的一個(gè)封閉的平面圖形

9、a plane figure that deviates from a square or circle due to elongation
由于延長(zhǎng)而偏離正方形或圓圈的平面形狀。

10、A plane figure with four sides and four angles
四邊形有四個(gè)邊和四個(gè)角的平面圖形

11、The area of an irregular plane figure can readily be obtained with this method.
采用該方法可以很容易地求解不規(guī)則平面圖形的面積。

12、A septilateral shape is a plane figure with seven sides.
七邊形是在一個(gè)平面上有七個(gè)邊。

13、A triangle is a plane figure with three sides.
三角形是有三個(gè)邊的平面圖形。