In Geometry, we can find different basic shapes. The three pillars of geometry that help to construct a shape are a point, line, and plane. Point is an undefined term that usually represents a location. The notation used to define point is a dot (.). A point does not have any measures such as length, breadth, and width. Like points, a line is an undefined term, and we can say that a line is a straight arrangement of points. It has length, but it does not have thickness. A line which is made up of two endpoints, such as left endpoint (say A) and right endpoint (Say B), then it is known as line segment (Say AB). A plane is a flat surface in the two – dimensional space. Apart from these, there are some other terms such as angle, and vertex are commonly used to form a shape. The shapes are classified into two different types. They are:
- Two Dimensional Shapes ( 2D shapes or flat shapes)
- Three Dimensional Shapes ( 3D shapes or solid shapes)
Two Dimensional Shapes
Two – dimensional shapes are the shapes that have only two measurements, such as length and height. It does not have a width. For any two dimensional figures, we can find the area and perimeter. The area is the space occupied by the flat objects, and the perimeter is the length of the outline of a shape. For example, we can find the area and perimeter of a square, rectangle, circle, triangle, and so on.
Three Dimensional Shapes
Three – dimensional shapes are also known as “sold shapes”, and it has a length, width, and height as its dimensions. Like 2D shapes, the surface area and volume can be found for three-dimensional objects. The total area of a surface of solid shapes is called surface area and the total space occupied by the 3D objects are called volume. Some of the examples of three-dimensional shapes are a cube, cuboid, cone, and so on.
When a square is rotated on the plane surface, we can obtain the measure as the volume of a cube. Because the three-dimensional objects are obtained as a result of the rotation of the two-dimensional objects. As the faces of the 3D shapes are flat sides, we can see the 2D flat shapes on the three-dimensional shapes.