Geometric shapes are the figures which demonstrate the shape of the objects we see in our everyday life. In geometry, shapes are the forms of objects which has boundary lines, angles and surface. There are different types of 2d shapes and 3d shapes.
In plane geometry, the two-dimensional shapes are flat shapes and closed figures such as circle, square, rectangle, rhombus, etc. In solid geometry, the three-dimensional shapes are cube, cuboid, cone, sphere and cylinder. We can observe all these shapes in our daily existence also. For example books (cuboid shape), glasses (cylindrical shape), traffic cones (conical shape) and so on. In this article, you will learn different geometric shapes and their definition along with the examples.
Table of Contents:
- Table of 2d shapes
- Three-Dimensional Shapes
- Open and Closed Figures
- Solved Examples
|To be Noted:
Shapes are nothing but simple geometric figures which have a specific boundary, interior and exterior surface area. In geometry, we can learn various shapes and their properties. Students are introduced with geometry in their classes with basic shapes and terms.
Geometric Shapes Definition
Geometrical shapes are the figures which represent the forms of different objects. Some figures are two-dimensional, whereas some are three-dimensional shapes. The two-dimensional figures lie on only x-axis and y-axis, but 3d shapes lie in x,y and z axes. The z-axis shows the height of the object. As we have already discussed in the introduction, there are different shapes defined in geometry.
To draw any of these figures start with a line or a line segment or a curve. Depending upon the number and arrangement of these lines, we get different types of shapes and figures like a triangle, a figure where three line segments are connected, Pentagon (five-line segments) and so on. But every figure is not a complete figure.
List of Geometric Shapes
Here is the list of different geometric shapes that we learn in geometry.
|Two Dimensional Shapes||Three Dimensional Shapes|
Types of Shapes
Go through the different types of shapes in geometry along with definitions here.
Triangle is a polygon, which is made of three sides and consists of three edges and three vertices. Also, the sum of its internal angles equals to 180o.
Locus of all points at a fixed distance from a reference central point is called a Circle.
Square is a quadrilateral where all the four sides and angles are equal and the angles at all the vertices equal to 90° each.
A quadrilateral which has its two pairs of opposite sides equal in length and interior angles are at the right angles.
A parallelogram is a quadrilateral with two pairs of parallel sides and opposite angles are equal in measures.
Table of 2d Shapes
Most of the three-dimensional shapes can be defined as a set of vertices, lines that connect the vertices and faces enclosed by these lines including obtained interior points. For many three dimensional shapes, faces are two-dimensional. Also, some shapes in three-dimensions have curves surfaces. In three dimensions, the primary shapes are:
These can be better understood with the help of the table given below:
|Name of the shape||Figure||Definition|
|Cube||A cube is a three-dimensional shape which has 6 faces, 8 vertices and 12 edges. The faces of the cube are square.
Example: A Rubik’s cube
|Cuboid||A cuboid is also three dimensional solid having 6 faces, 8 vertices and 12 edges but the faces of the cuboid are in a rectangular shape.
|Cone||A cone is a solid which has a circular base and narrows smoothly from surface to the top at a point called apex or vertex.
Example: An icecream cone
|Cylinder||A cylinder is a 3d solid shape that has two parallel circular bases connected by a curved surface. It has no vertex.
Example: Gas cylinder
|Sphere||A sphere is a round shape in 3d plane, whose radius is extended to three-dimensions (x-axis, y-axis and z-axis).
Open and Closed Figures
A point is a small dot which is the starting point of a line segment. By definition, a line segment is a part of a line in which a narrow lane is connecting two points within a line. Different numbers of line segments give us different figures and such figures may be either open figure or closed shapes or figures.
Geometric shapes such as a square, rectangle, and triangles are few basic 2D shapes. These figures are collectively called polygons. A polygon is any flat shape or plane on a surface of a paper. They have a finite closed boundary made up of a fixed number of line segments and are called sides of the polygon. Each side meets at a common point called corners (vertex).
Such bounded geometric shapes like polygons are called closed figures. A boundary of a closed figure is not only made of line segments but also by curves. Hence, a closed figure can be defined as any geometric shape which starts and ends at the same point to form a boundary by line segments or by curves.
Open figures are incomplete shapes. To sketch a closed figure one has to meet both the starting point and ending point. Open figures are also depicted by using line segments or by curves but at least of the lines will be discontinuous. An open figure’s starting and endpoints are different.
Q.1: Find the open figure from the following.
Q.2: How many sides do a decagon has?
Answer: The correct answer is C.
A decagon has 10 sides and 10 vertices.
Q.3. A cone is a two-dimensional shape or three-dimensional shape?
Answer: A cone is a three-dimensional solid shape with a circular base and a single vertex. The surface of the cone is narrowed from the base to the vertex.
Frequently Asked Questions – FAQs
What are the different geometric shapes in Maths?
Circle, Triangle, Square, Rectangle, Kite, Trapezium, Parallelogram, Rhombus and different types of polygons are the 2-d shapes.
Cube, Cuboid, Sphere, Cone and Cylinder are the basic three-dimensional shapes.
What are the types of triangles in geometry?
What are the basic kinds of polygons?
Quadrilaterals – square, rectangle, parallelogram, trapezium, kite
What are the examples of three-dimensional shapes?
Cuboid- A wooden rectangular box, matchbox
Cone- Icecream cone, Pyramid
Sphere- Football, Basketball
Cylinder- Gas cylinder, Cylindrical jar