Steps of construction are given below :

⇒ Draw line segment BC of length 4.5cm.

⇒ With C as a center and radius CD = 5cm draw an arc.

⇒ With B as a center and radius BD = 7cm draw an arc intersecting the previous arc at D.

⇒ Again with C as the center and 5.5cm as a radius draw an arc.

⇒ Then with D as the center and 5.5cm as radius, draw an arc intersecting the point at A.

⇒ Join AB, AD, CD, BD, and AC.

Thus, ABCD is a required quadrilateral.

1. A sea is a much bigger body of water whereas a river is a thin and long body of water.
2. There is higher salinity in sea water as it contains the minerals carried by rivers. On the other hand, rivers have fresh water.
3. Rivers generally lead to the sea while the latter is an interconnection system of oceans.
4. Waves in the sea move slower as compared to the running water in a river.

The East India Company was an English company formed for the exploitation of trade with East and Southeast Asia and India. Incorporated by royal charter on December 31, 1600, it was started as a monopolistic trading body so that England could participate in the East Indian spice trade. Being motivated by the successful business stories of the Portuguese a group of English merchants -'Merchant Adventurers' formed a company- the East India Company in 1599 AD. The Company received a royal charter from Queen Elizabeth I on December 31, 1600 AD authorizing it to trade in the East.

According to the authors, the causes of the decline of the Mughal Empire can be grouped under the following heads: a) deterioration of land relations; b) emergence of regional powers as successor states; c) selfish struggle of nobles at the court; d) lack of initiative in modern weapons; e) lack of control over the bankers of the state and above all f) Aurangzeb’s Deccan campaign. Many historians blame Aurangzeb for the decline of Mughal empire, They said he reimposed the jizya tax on non-Muslims, he even took tax from the local people, he spent 25 years out of his empire to fight with the Maratha's and made Sikhs and Hindus live according to Islam.

Colonialism is the practice by which a powerful country directly controls less powerful countries and uses their resources to increase its own power and wealth. Colonialism refers to the practice of one nation establishing its presence in another. Oftentimes, ths is done by force or by being the first to discover a new nation. The reasons for African colonisation were mainly economic, political and religious. During this time of colonisation, an economic depression was occurring in Europe, and powerful countries such as Germany, France, and Great Britain, were losing money.

The historians of the Indian history re-interpreted the document of the colonial India since they all were written under the influence and in favour of the colonial government with too much bias and it was made sure that nothing would be go against the pride and respect of the government. The British believed that by preserving official documents, it would be easier for them or any other persons to know about the decisions taken in the past. One can study the notes and reports that were prepared in the past. Their copies may be prepared and used in present time if needed so.

The British were very interested in preserving all important documents and letters. For this, they established record rooms attached to all administrative institutions such as the village tahsildar's office, the collectorate, law courts etc. They also set up archives and museums to preserve important records. According to the britishers the official documents can be preserved in Archives and Museums which can be utilized at a later period for reference and debating.

According to the Britishers the official documents can be preserved in Archives and Museums which can be utilized at a later period for reference and debating. The British were very interested in preserving all important documents and letters. For this, they established record rooms attached to all administrative institutions such as the village tahsildar's office, the collectorate, law courts etc. They also set up archives and museums to preserve important records.

The British were very interested in preserving all important documents and letters. For this, they established record rooms attached to all administrative institutions such as the village tahsildar's office, the collectorate, law courts etc. They also set up archives and museums to preserve important records. The British felt that all the important letters and documents must be carefully preserved. So they set up record rooms attached to administrative institutions, and institutions such as archives and museums were also established for preserving records.

Water is essential for all life on the farm. Farmers obtain most of the water for their crops from rain. Rainwater that is not absorbed by the soil and plant roots runs into streams and rivers. Farmers in areas where there is not enough rain for their crops to grow must irrigate their fields. If there are rivers in that particular region then the farmers can construct short canals from the rivers and use that water for irrigation. 4) Farmers should conserve rainwater through building water storage tanks so that every drop of rainwater is conserved for future use.

One of the most primary sources of modern Indian history is the official records of the British colonial administration in India. The culture of memos, notings and reports preserved by the British has come to be seen as an authentic source of Indian historiography. Preserved documents from village tahsildar’s office, the collectorate, the commissioner’s office, the provincial secretariats and the lawcourts – are also useful. These added to the records preserved in archives and museums are an important source material for history writing in India.

Apart from the official records, there were diaries of people, accounts of pilgrims and travellers, autobiographies of important personalities, and popular booklets, writings in newspaper and other print media.