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CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

The topic – Visualizing shapes from Class 8th Maths discussed here. We have discussed in earlier blogs that various types of figures exist like one-dimensional, multi-dimensional like two dimensional and three-dimensional figures. We come across many of them in our day to day life.

Live tuition classes for 8th Class Maths are available on our website takshilalearning.com.

A figure having the only length like a line segment is known as one dimensional

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

A figure having only length and breadth like a polygon is known as two dimensional

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

A figure having length, height and breadth like a cuboid is known as three dimensional

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

Visualization of 2-D shapes and their representation on paper is very convenient. We will now understand how to visualize 3-D shapes.

Polyhedron

A three-dimensional solid shape composed of polygons is called a polyhedron. We will understand the words related to polyhedron-

Faces:-The polygons forming a polyhedron are called its face.

Edges:-The line segments where the faces of a polyhedron intersect are called its edges.

Vertices:-The corners where the edges of a polyhedron intersect are called its vertices.the point, where three or more edges meet, is called a vertex.

Examples of polyhedron

  • Cuboid – A cuboid has 6 faces,8 vertex, and 12 edges

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

 

  • Cube – A cuboid has 6 faces,8 vertex, and 12 edges

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

 

  • Square pyramid-A square pyramid has 5 faces ,8 edges, and 5 vertices

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

 

  • Triangular Pyramid-A triangular pyramid has 4 face, 6 edges, and 4 vertex.

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

 

  • Triangular prism-A triangular prism has 5 faces, 9 edges, and 6 vertices.

CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

 

We come across many of the shapes that are actually not polyhedron but they are made up of polygons.eg:- a sphere, a cone, a cylinder.

Watch and understand 2D -3D shapes with 2D-3D animated videos, for demo click 8 Class Maths

Regular polyhedron:-If the faces of a polyhedron are made up of regular polygons and the same number of faces meets at each vertex, a polyhedron is called a regular polyhedron. Eg: – Cube

A cuboid is not a regular polyhedron since its faces are not congruent rectangles.

Convex polyhedron:-if in any polyhedron the line segment joining any two points on its surface lie entirely inside or on the polyhedron, a polyhedron is called a convex polyhedron, in other cases, it is a concave polyhedron. Cube, cuboid, pyramid, and prism are examples of convex polyhedrons.

In the next article, we will try to understand prism and the various types of the prism. Also, we will understand pyramid and platonic solids.

For chapter wise study material, maths solutions, question bank, keynotes, practice papers of Class 8 Maths, click on NCERT Maths solutions for Class 8.

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CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16 CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16 CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16 CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16CBSE & NCERT Solutions Class 8 Maths Visualizing Shapes : Chapter 16

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February 22, 2018

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