DATA HANDLING Data Handling 5 - NCERT

SQUARES AND SQUARE ROOTS IntroductionYou know that the area of a square = side side (where side means the length ofa side ). Study the following of a square (in cm)Area of the square (in cm2)11 1 = 1 = 1222 2 = 4 = 2233 3 = 9 = 3255 5 = 25 = 5288 8 = 64 = 82aa a = a2 What is special about the numbers 4, 9, 25, 64 and other such numbers?Since, 4 can be expressed as 2 2 = 22, 9 can be expressed as 3 3 = 32, all suchnumbers can be expressed as the product of the number with numbers like 1, 4, 9, 16, 25, .. are known as square general, if a natural number m can be expressed as n2, where n is also a naturalnumber, then m is a square number. Is 32 a square number?We know that 52 = 25 and 62 = 36. If 32 is a square number, it must be the square ofa natural number between 5 and 6. But there is no natural number between 5 and 32 is not a square the following numbers and their 1 = 122 2 = 4 Squares and SquareRootsCHAPTER5 Rationalised 2023-2452 MATHEMATICSTRY THESE33 3 = 944 4 = 1655 5 = 256-----------7-----------8-----------9- ----------10-----------From the above table, can we enlist the square numbers between 1 and 100?

(b) Number of wickets taken by a bowler in the last 10 ODIs. (c) Marks scored by the students of your class in the Mathematics unit test. (d) Number of story books read by each of your friends etc. The information collected in all such cases is called data. Data is usually collected in the context of a situation that we want to study .

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