学中文【形状】Shapes in Chinese 学写数学中的汉字 – Learn to Write Chinese Characters in Math

圆形, 三角形, 正方形, 椭圆形, 长方形, 星形。

Yuán xíng, sān jiǎo xíng, zhèng fāng xíng, tuǒ yuán xíng, cháng fāng xíng, xīng xíng。

Round, triangle, square, oval, rectangle, star。

形状是一物体或其外部边界、轮廓及其表面所组成的,和物体的其他特性(如颜色、纹理、材料组成等)无关。形状也可以是由边或曲线或以上两种东西的结合来形成的封闭空间。

A shape is composed of an object or its outer boundary, contour and surface, and has nothing to do with other characteristics of the object (such as color, texture, material composition, etc.). The shape can also be a closed space formed by a side or a curve or a combination of the above two things.

许多简单的形状可以加以分类,例如多边形可以依其边的个数分为三角形、四边形、五边形等。每一种分类也可以再细分,例如三角形可以分为正三角形、等腰三角形、锐角三角形、钝角三角形、直角三角形等,而四边形也可以分为矩形、菱形、梯形、正方形等。

其他常见的形状有点、直线、平面,以及像椭圆、圆、抛物线等圆锥曲线。

常见的三维形状有由许多平面组成的多面体、蛋形或是球形的椭球、圆柱及圆锥等。

若一个物体外形属于某一分类或是接近某一分类,就可以用那种分类来形容其形状。例如窨井盖的形状为圆盘,因为它外形近似一个真实的圆盘。

Many simple shapes can be classified. For example, polygons can be divided into triangles, quadrilaterals, pentagons, etc. according to the number of sides. Each category can also be subdivided. For example, triangles can be divided into equilateral triangles, isosceles triangles, acute triangles, obtuse triangles, right triangles, etc., and quadrilaterals can also be divided into rectangles, rhombuses, trapezoids, squares, etc.

Other common shapes are points, straight lines, planes, and conic curves like ellipses, circles, and parabola.

Common three-dimensional shapes are polyhedrons composed of many planes, egg-shaped or spherical ellipsoids, cylinders and cones.

If the shape of an object belongs to a certain category or is close to a certain category, that category can be used to describe its shape. For example, the shape of the manhole cover is a disc, because its shape is similar to a real disc.