GEOMETRICAL REPRESENTATION OF REAL NUMBERS

Number system of Class 9

To represent any real number of number line we follows the following steps :

Length BD is equal to GEOMETRICAL REPRESENTATION OF REAL NUMBERS.

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REPRESENTATION OF NUMBERS ON THE NUMBER LINE BY MEANS OF MAGNIFYING GLASS:

Method to find such numbers on the number line

1. Choose the two consecutive integral numbers in which the given number lies.

2. Choose the two consecutive decimal points in which the given decimal part lies by dividing the two given decimal parts into required equal parts.

3. Visualize the required number through magnifying glass.

For example:

Visualize the representation of GEOMETRICAL REPRESENTATION OF REAL NUMBERS on the number line upto 5 decimal places.

Since 5 < 5.37777 < 6

5.3 < 5.37777 < 5.4

5.37 < 5.37777 < 5.38

5.377 < 5.37777 < 5.378

Proceeding by successive magnification and successively decreasing the lengths of the portions of the number line in which GEOMETRICAL REPRESENTATION OF REAL NUMBERS is located. First, we observe that GEOMETRICAL REPRESENTATION OF REAL NUMBERS is located between 5 and 6. In the second step, we locate GEOMETRICAL REPRESENTATION OF REAL NUMBERS between 5.3 and 5.4. To get a more accurate visualization, we divide this portion of the number line into 10 equal parts and use a magnifying glass to visualize that GEOMETRICAL REPRESENTATION OF REAL NUMBERS lies between 5.37 and 5.38. Now to visualize GEOMETRICAL REPRESENTATION OF REAL NUMBERS still more accurately, we divide the portion between 5.377 and 5.378 into 10 equal parts, and visualize the representation of GEOMETRICAL REPRESENTATION OF REAL NUMBERS as shown in figure.

GEOMETRICAL REPRESENTATION OF REAL NUMBERS

CONVERSION OF REPEATING DECIMAL INTO RATIONAL NUMBER:

For example:

Express GEOMETRICAL REPRESENTATION OF REAL NUMBERSin the form GEOMETRICAL REPRESENTATION OF REAL NUMBERS.

Let GEOMETRICAL REPRESENTATION OF REAL NUMBERS

Multiplying both sides by 10, we get

GEOMETRICAL REPRESENTATION OF REAL NUMBERS …(i)

Multiplying both sides again by 10, we get

GEOMETRICAL REPRESENTATION OF REAL NUMBERS …(ii)

Subtracting (i) from (ii), we get

GEOMETRICAL REPRESENTATION OF REAL NUMBERS

GEOMETRICAL REPRESENTATION OF REAL NUMBERS

GEOMETRICAL REPRESENTATION OF REAL NUMBERS

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