4th Class

Area and Perimetre

Area and Perimetre Introduction In the previous chapter we have studied about the shape and size of some geometrical figures. In this chapter we will study about area and perimetre of some close geometrical figures, Area Area is referred as the surface occupied by the geometrical shapes

Area of a Triangle Area of a triangle

Where base is one side of a triangle and height is the length of altitude drawn from opposite vertex on the given base,

Area of the triangle

Where more...

Catgeory: 4th Class

Data Handling

Data Handling Introduction In our day to day life, time to time we come across graphs while reading or watching news, etc. The graphs are prepared with the help of data. Data is collected through survey or other means. The data can be arranged in a specific order as per our need by using table. In this chapter we will study about some of the graphical representation of data, how to make the graphs and how to extract information?s contained by the graphs. Data The information which is collected in the form of numerals is called data. Raw Data The initial data that the observer collects himself is called raw data. Grouped Data To extract the more...

Catgeory: 4th Class

Computer and Its Peripherals

Computer and Its Peripherals Introduction Computer peripheral is defined as the device that is connected with the host computer. A computer peripheral only useful when it is able to communicate with external or internal environment. When you work with the computer you input your data and instructions. Through some devices to the computer. These devices are called input devices. Similarly, computer after processing given output through other devices called output devices. Input/ Output devices are known as peripherals since they surround the CPU and memory of a computer system. Computer can also be defined in terms of functions more...

Catgeory: 4th Class

Computer Memories and Its Types

Computer Memories and Its Types Introduction A memory is just like a human brain. It is us to store data and instructions. Computer memory is the storage space in computer where data is to processed and instructions required for processing are stored. The memory is divided into large number of small parts called cells. Each location or cell has a unique address which varies from zero to memory size minus one. For example if computer has 64k words, then this memory unit has 64*1024=65536. The address of these locations varies from 0 to 65535. Units to measure memory are given more...

Catgeory: 4th Class

Characteristics of Memory Devices

Characteristics of Memory Devices Introduction You may have used the computer to store games, music, files and pictures in it. These files get stored in the memory devices. A memory is just like a human brain. It is used to store data and instruction. A memory system is a hierarchy of storage devices with different capacities, costs and access times. When a user issue commands to start application software, such as word processing, the operating software, such as word processing, the operating system locates the program in the storage and loads it into memory. In this we will learn about some characteristics of memory device. more...

Catgeory: 4th Class

Software Classification

Software Classification Introduction When you play games on a CD, you can see and touch the CD but can't the games. In this case, the CD is the hardware and games make up the software. Software is commonly known as programs or app, consists of all the instructions that tell the hardware how to perform a task. Computer software is a computer tool that will help computer users to interact with the machine or the hardware in a computer. Without computer software's you will not be able to make the computer run and thus working on computer may not be easy as it is today. Software programs are normally written and compiled for certain hardware platforms. It more...

Catgeory: 4th Class

A Brief About Computer Languages

A Brief About Computer Languages Introduction You communicate with your family and friends by speaking languages like English, Hindi or your mother tongue. A computer can understand only binary language because it operates upon electricity Electric signals have two states ? ON or OFF (or 10 be very specific ? high voltage or low voltage,) If we denote ON by 1 and OFF by 0,, it becomes a binary language i.e. a language with just two symbols. For the computer 1 means ?Yes there is power? and 0 means ?No, there is no power?. Thus, it can understand only electric signals and the computer can understand binary language as n symbolizes electric signal. more...

Catgeory: 4th Class

Fundamentals of Windows 10

Fundamentals of Windows 10 Introduction Windows 10 is the latest OS version from Microsoft Officially it was released in July and was initially offered free of charge to legitimate users of' Windows 7 and Windows 8. The new version combines features from these two previous versions to suit the users m, a better way for both Desktop/Laptop computers as well as mobile device. It will certainly be useful to known them in case you want to upgrade from an older systems. The main requirements are:

A processor (CPU) with more...

Catgeory: 4th Class

Hands on With Paint Brush

Hands on With Paint Brush Introduction Microsoft Paint or 'MS Paint' is a program or a basic graphic program that is included in all the Microsoft Windows versions. It can be used to draw, color and edit pictures, including imported pictures. To open Paint Brush, do the following steps:

Click Windows button and select “Window Accessories” folder from the start menu list.
Select Paint

To open MS-Paint type “paint” in the search box on the task bar and then select paint from the list of result.

more...

Catgeory: 4th Class

Working With MS Word 2013

Working With MS Word 2013 Introduction World processing is an application program that allows you to create letters, reports, newsletters, tables, from letters, brochure and web pages. Using this application program you can add pictures, tables and charts to your documents. You also use check spelling and grammar checker. Main Features of word 2013 MS Word 2013 has useful features, edit professional - looking user document using comprehensive set of easy to use tool provided by MS word. more...

Catgeory: 4th Class

4th Class

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