circumcircle

circumcircle的音标是[ˌsɜːkmɪˈsɪə(r) slɪə(r)]，基本翻译是圆周圈，速记技巧是“吃肉松”谐音记忆。

circumcircle这个词的词源可以追溯到拉丁语词“circum”和词“cicurculum”，意思是“圆周”。这个词的变化形式主要有复数形式“circumcircles”和过去式、过去分词形式“circumcircle”。

相关单词：circle（圆）、perimeter（周长）、diameter（直径）、radius（半径）、concentric（同心）、eccentric（椭圆）、inscribe（内接）、excircle（外切）、circumscribe（圆周切割）、encircle（环绕）。

在英语中，circumcircle意为“圆周的边界或界限”，这个词可以用来描述一个图形或形状的边缘，也可以用来描述一个数学概念，即一个圆或椭圆的外部边界。这个词的使用非常广泛，可以用于描述各种不同的场景和情境。同时，这个词也反映了英语中对于数学和几何学的广泛应用和重视。

常用短语：

1. circumference of a circle

2. inscribed circle

3. inscribed polygon

4. diameter of a circle

5. radius of a circle

6. central angle

7. circumcenter

双语例句：

1. The circumference of a circle is equal to twice the radius. (圆的周长等于直径的两倍。)

2. The inscribed polygon has 9 sides, which is the same as the circumcircle. (内接多边形的边数与外接圆相等，都是9边。)

3. The circumcenter of a triangle is the intersection of its three medians. (三角形的外接圆圆心是三边中垂线的交点。)

4. The radius of a circle determines its size and shape. (圆的半径决定大小和形状。)

5. Diameter is the longest radius of a circle. (直径是圆中最长的半径。)

6. The circumcircle of a triangle is called the inscribed circle of the triangle. (三角形的外接圆被称为三角形的内切圆。)

7. The angle at the center of a circle is called the central angle. (圆心角在圆中的角度被称为中心角度。)

英文小作文：

Circle is a very important geometric shape in mathematics, and it has many interesting properties. One of the most interesting properties of a circle is its circumcircle, which is the largest circle that can be drawn inside or outside the given circle. It is also called the inscribed circle of the given circle.

The circumcircle of a circle can be used to measure its size and shape, and it can also be used to find other properties of the circle, such as its center and radius.

In this way, the circumcircle plays an important role in many applications, such as geometry, physics, and engineering.

Therefore, it is worth studying and understanding this fascinating geometric shape better!