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

2、A four-sided plane figure with four right angles
矩形，長方形具有四個邊的方形，有四個直角

3、A four-sided plane figure with opposite sides parallel
平行四邊形一種有四條邊且每兩條邊對應(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.
由兩個半徑和兩個半徑中間的弧所形成的一個平面形狀。

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
四邊形有四個邊和四個角的平面圖形

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.
七邊形是在一個平面上有七個邊。

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