Shape - Definition with Examples
What is a Shape?
Shape Definition: A shape is a figure or surface area enclosed by a boundary. For example; circle, triangle, rectangle etc.
Shapes Around Us
The things like clock, money, chessboard, signboard etc. which we come across in everyday life are examples of different shapes.
Types of Shapes
Geometric shapes are classified according to the number of dimensions they exhibit.
The shapes that exhibit only two dimensions (height and width) are known as 2D shapes or two-dimensional shapes.
The shapes that exhibit three dimensions (height, width and depth) are known as 3D shapes or three-dimensional shapes.
A list of basic geometric shapes along with names and pictures taught to kids in elementary math is given below.
Open and Closed Shapes
The shapes can be open or closed. They can be formed by curved lines or straight lines.
The shapes that have at least one line segment which is not connected to any other line segment at one of its end point are known as open shapes.
The shapes that have all its line segments connected at both end points are known as closed shapes.
Attributes of Geometric Shapes
The attributes of the shapes make them similar or different. Example, a shape with 3 sides is called a triangle whereas a shape with 5 sides is called a pentagon.
The defining attributes do not change for a shape whereas non-defining may change.
Dimensions of Geometric Shapes
A point is zero-dimensional as it has no dimension (no length, height or width).
A line segment/line is one-dimensional as its length is measured only in one direction. A line segment begins with a point.
Flat figures drawn on a plane whose lengths are measured in two directions (height and width) are called two-dimensional shapes. For example; rectangle, circle, triangle etc. Two-dimensional shapes are formed by combination of line segments and/or curves.
Solids with three dimensions (height, depth and length) are called three-dimensional figures. For example, cube, cuboid, prism etc. Three-dimensional shapes are formed by combinations of 2D-faces.
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