Class 9 Maths Chapter 8 | Quadrilaterals | Exercise 8.2 Solutions

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2:57 question 1 9:34 question 2 20:10 question 3 28:45 question 4 32:38 question 5 42:15 question 6

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Corresponding part of congruent triangle

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In question no.2nd we can also do this . 1 ) By SSS congruency rule we proved that ∆AOB is congruent to ∆AOD 2 ) By C.P.C.T we proved that angle 1= angle 2 . 3) angle 1 + angle 2 = 180° Angle 1 + angle 1 = 180° ( we proved above that angle 1 is = to angle 2) So .angle 1= 90° 4) Hence, proved that it is a rectangle (because we prove 1 angle 90°)

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Which is angle 1 and which is angle 2 how will we all understand???

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I have already tell in 1 and 2 point .

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∆AOB and ∆AOD we proved congruent by SSS congruency rule so,I will give the name of angle which is angle 1 and angle 2

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@@AnushkaTiwari-zu3lx which angle of ∆AOB and ∆AOD?

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@@AnushkaTiwari-zu3lx are u mad ? We have to prove PQRS is a rectangle and you have taken another angle named 1 and 2

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1:45

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Sir 3 questions me mis points theoram nahi laga sakte hai kya jaise 1 questions me lagta ki reply 👍👍👍

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2:57 9:56 20:10 28:45

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2:00 9:34

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Sir pqrs Ko triangle prove karna tha , Parallelogram to Ham bhi proof kar sakte hain

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This exercise is a little bit tough..... 😢😢 but when md sir is here then no fear😊😊😊😊😊😊🎉🎉🎉🎉 Thank you so much sir for explaining each question wonderfully

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20:38

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❤❤❤❤❤ nice explanation

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Sir in question no.2nd there is no need to prove that it is a parallelogram only to prove that it is a rectangle so ,we prove any one angle 90°

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Aap pahle question acche se dekhe

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Any one 90° toh square ka bhi hota hai na

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@SupriyaNayak-l7h But in this question we have to prove rectangle so,we prove one angle 90°

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@@AnushkaTiwari-zu3lx BUT WE HAVE TO PROVE IT A PARALLELOGRAM TO MAKE THE SMALL QUADRILATERAL A PARALLELOGRAM AND THEN EQUATE THE OPPOSITE ANGLES

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Sir jb ye question solve karege tb bhi mid point theorem prove karege kya ???

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Sir we do in last question that angle ADM =DCB [corresponding angle ]

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Sir first question ka solution parallelogram Tak likh sakte na

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42:00

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Mid point os AC 43:43

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Sabhi square rectangle hote hain

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Topics Covered in this video - Ncert class 9 chapter 8 Quadrilaterals class 9 maths chapter 8 Quadrilaterals Quadrilaterals class 9 maths CBSE class 9 maths class 9 maths chapter 8 Quadrilaterals class 9 ncert class 9 maths chapter 8

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1:30 QUE 1

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Sir ch 8 me ncert ex 8.1 ka questin meri book me rhombus ka diya hai na ki rectangle ka please ap ke bare rhombus wale tari ke se explain kar do

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