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Example 3 - Chapter 1 Class 9 Number Systems (Term 1)
Last updated at Sept. 9, 2020 by Teachoo
Irrational Numbers
Chapter 1 Class 9 Number Systems
Concept wise
- Rational numbers - Definition
- Finding rational number between two numbers
-
Irrational Numbers
- Simplifying real numbers
- Rationalising
- Laws of exponents
- Finding decimal expansion
- Expressing decimal in p/q
- Classifiying rational/irrational
- Finding irrational numbers b/w two numbers
- Real numbers on a number line
Transcript
√𝟐 on the Number line Represent √𝟐 on Number Line Let’s draw the number line Hence, point P is √𝟐 Using Pythagoras Theorem OB2 = OA2 + AB2 OB2 = 12 + 12 OB2 = 2 OB = √2 Example 3 Locate 2 on the number line For drawing 2 we consider Pythagoras theorem. Using Pythagoras theorem Hypotenuse2 = Base2 + Height2 Hypotenuse = ("Base2 + Height2" ) Hypotenuse = (1^2+1^2 ) Hypotenuse = 2 Point P is the point of 2
