Concise Mathematics Class 7 ICSE Solutions for Chapter 18 - Recognition of Solids

A solid is a three-dimensional object that has length, breadth, and depth. It is the football that you play, the book you read, the LPG cylinder you use for cooking, and so on. In this chapter, you will learn about solids and different types of solid shapes.

An object that occupies space and has a fixed space is called a solid. Solids have length, width, and height. They make up a three-dimensional figure. Solid objects have only three views. They have a top view, side view, and front view.

Cuboid

Cuboids are three-dimensional figures composed of rectangular faces. They are box-shaped figures. Cuboids also have vertices and edges, which are not equal. The opposite faces, however, are equal.

The characteristics of cuboids are; Cuboids consist of six rectangular faces. Opposing faces of a cuboid share the same edge. The point where three faces intersect is the vertex. The cuboid has right angles.

Cube

The cube is a three-dimensional figure consisting of square-shaped faces, all the same size. It has six equal faces and all the faces are square. It has eight vertices and 12 edges. There are six square faces on a cube. The edges and faces are all equal. The angles are at right angles. Each of the six faces meets the adjacent four faces. Each of the five vertices touches all six faces. The edges opposite one another are rectangles.

Cylinder

A cylinder is a solid object whose three-dimensional shape is formed by two parallel bases bound by a curved surface. These bases are circular disks. The center line or the connecting line between the two circular bases forms the axis. The height of the cylinder is determined by the distance between the two bases of the cylinder, denoted as height, "h". There are two edges, three faces, and no vertex on the cylinder.

Cone

As a three-dimensional shape, a cone narrows smoothly from a flat base (usually circular) to a point (that forms an axis with the base's center point) called the vertex or apex. Alternatively, cones can also be defined as pyramids that have circular cross-sections, as opposed to pyramids that have triangular cross-sections. They are therefore also called circular cones.

Benefits of ICSE Solutions for Class-7 Mathematics

• Solutions are presented in an easy form. With the introduction of many new concepts, chapters, class 7 maths becomes difficult for students to understand. This is why we have provided the solutions in the easiest way possible using the short tricks and techniques, this will help them to understand the chapters easily. 

• Despite the fact that textbooks also include questions, Since the solutions include so many questions, it is important for students to practice the different types of questions that may appear in the exam. Thus, You can improve your problem-solving abilities by downloading ICSE Class 7 Maths Solutions. 

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