Concise Mathematics Class 8 ICSE Solutions for Chapter 19 - Representing 3-D in 2-D

The Class 8 Chapter 19 Solutions Selina Concise Maths PDF contains comprehensive solutions for all of the problems in the chapter. Each explanation contains all of the conclusions and reasoning that were used to arrive at the solution. Even if they are practicing for the first time, students would be able to understand each term easily. Let’s look at the topics discussed in Selina Concise Maths Class 8 Solutions Chapter 19.

• Plane shapes: two-dimensional shapes

• Solid shapes: three-dimensional shapes

• View of 3-D shapes

• Maps

• Polyhedrons: Convex Polyhedrons & Regular Polyhedrons

• Prisms

• Pyramid

• Euler’s formula

Shapes in Two Dimensions

A 2D shape is a shape or figure that has a length and a breadth in Geometry. To put it another way, a plane object with just length and width is two-dimensional. The sides of this form are made up of straight or curved lines. Furthermore, there may be any number of sides on these figures. Polygons are plane figures made up of lines in general. Triangles and squares, for example, are polygons. Two-dimensional shapes include rectangles, squares, circles, triangles, quadrilaterals, and pentagons.

Shapes in Three Dimensions

In our daily lives, we come across a variety of things with various shapes. Books, a ball, an ice cream cone, and so on. One feature that all of these objects have in common is that they are all different dimensions, widths, and heights or depths. As a consequence, they have three dimensions and are referred to as 3D forms. Dimension is represented by alphabet D in 3D. Space is taken up by 3D forms. You can go forward, backward, right, left, and even up and down in a three-dimensional universe. 3D shapes include cuboids, squares, cylinders, spheres, pyramids, and cones, to name a few.

Faces, Edges, and Vertices

The cube's vertices are its four corners. The edges of the cube are the 12 line segments that make up its skeleton. The faces of the cube are the six flat square surfaces that make up its skin. The faces of the three-dimensional forms can be described as two-dimensional figures. A cylinder, for example, has two faces, both of which are circles. A pyramid also has a triangle on one of its sides. You can download a free PDF of Class 8 Chapter 19 Solutions Selina Concise Maths complete notes 

Conclusion

When position, size, orientation, and reflection are removed from the definition of a geometric object, what remains is a geometric shape. That is, if you move a shape around, enlarge it, rotate it, or reflect it in a mirror, the effect is the same shape as the original, not a different one. As architects design structures, they often use 2D sketches to demonstrate how the structure would appear from all sides. Plans and elevations are the terminologies used to characterize these drawings. This chapter gives basic ideas for 2D and 3D shapes. After studying through Selina Concise Mathematics Class 8 Solutions Chapter 19, students will be more confident when attempting any questions from Geometry. Selina Concise free PDF solutions are developed by talented experts to provide students with top-notch error-free solutions. Students can download a free copy of the PDF that is available on Vedantu's website Vedantu.com.