2D 形状： 2D 代表“二维”。二维形状有两个维度——长度和宽度。二维图形也称为平面图形或平面形状，因为这些图形位于平面上。 2D 形状有面积但没有体积。直线构成 2D 形状的边。使用 X 轴和 Y 轴绘制 2D 形状。
3D 形状： 3D 代表“三维”。 3D 形状具有三个维度 – 长度、宽度和高度或深度。我们在日常生活中看到的一些东西都是3D形状的，比如书本、球、瓶子等，它们都有长、宽、高三个维度。 3D 形状也有面积和体积，因为它们占据空间。使用 X 轴、Y 轴和 Z 轴绘制 3D 形状。
下表列出了 2D 形状和 3D 形状之间的差异：
| Based on | 2D Shapes | 3D Shapes |
|---|---|---|
| Dimensions | A 2D shape has two dimensions- length and breadth. | A 3D shape has three dimensions- length, breadth and height. |
| Mathematical Axes used | X-axes, Y-axes. | X-axes, Y-axes and Z-axes. |
| View | 2D shapes are used to give simple view of an object. | 3D shapes are used to give architectural view of an object. |
| Edges visible | In 2D shapes, al the edges are clearly visible. | In 3D shapes, some of the edges are hidden. |
| Explanation | 2D shapes are easy to explain due to the visibility of all its edges. | In 3D shapes, only outer dimensions can be explained. |
| Detailing | It is easy to draw details in 2D shapes. | Detailing becomes difficult in 3d shapes. |
| Examples | Circle, Square, Rectangle or any other polygon, etc. | Cylinder, Prism, tube, Cuboid, etc. |
| Drawing | It is easy to draw 2D Shapes. | 3D shapes are complex in drawing. |