Theorem:8.3 Chapter:8 Quadrilaterals | Ncert Maths Class 9

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Don't say goodbye
Because it means you are leaving us for always..
I hope you wouldn't say again sir... 🥰😊

[@vidugupta1199]

3:18 Can't we take triangle CDA instead of taking ADC?

[@Rosieee65]

@@vidugupta1199 yeah but on the end answer you should put CDA

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sir aya ye theorem hbse wala board exam me De sakta ha ???????
Please reply to my question sir😊

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He and mkr sir are the bestBest

[@Prince9667-p6o]

5:05 ye jo abhi baat btai hai hamre sir to direct hai jaisa vaisa ka vaisa hi likhte hai ABC=ADC triangle 📐 Aisa hi and mein likhate hain. Batao reply sir reply karke ❤

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[@SIDHUMOOSEWALA..28]

Sir aapne angle 1 and angle 2 ko equal prove Kiya hai toh aap unke parallel kaise likh sakte hain. Please help

[@narayanachandratripathy4673]

We know that the alternative interior angles are equal of a parallel line in the chapter lines and angles
So we can prove your doubt ❤

[@kattarhindu9563]

Sir, isme, mene ASA se congruemt proof kra hai jaise ---->
GIVEN- ABCD is a quadrilateral
In which AB=CD and BC=AD
TO PROVE- ABCD is a parallelogram.
CONSTRUCTION - join AC
SOLUTION- in 🔺ABC and in 🔺 CDA
Angle 1 = angle 2 (alternate Interior Angle)
Angle 3 = angle 4 (alternate interior angle)
AC = AC (common)
🔺 ABC congruent 🔺 CDA (BY ASA)
AB = CD (CPCT)
AD=BC ( CPCT)
hence, opposite sides are equal, opposite angles are equal, thus, it is a parallelogram.
Sir kya ye sahi hai
❓❔❓❔❓❔❓❔❓❔❓❔
PLZ Reply fast sir
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Yes

[@vijaylakshmishukla4087]

Shi hai
Maine bhi aise hi kiya hai

[@Minasingh7386]

But Angle 1 and Angle 2 ko and Angle 3 and Angle 4 ko aase equal proof nhi kar sakte h .. iske liye line AB and CD or AD and BC ko parallel hona chahiye.
And vhi to hme proof Krna h

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[@vidugupta1199]

3:18 Can't we take triangle CDA instead of taking ADC

[@mukeshkesarwani799]

Noo

[@vidugupta1199]

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[@vidugupta1199]

3:18 Can't we take triangle CDA instead of taking ADC?

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Sir agar hum DC ko CD likhe toh sahi hoga

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Theorem 8.1 ka use karte congruent karne ke liya to jyada convenient hota

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Sir in a Parallelogram opposite angle are equal?

[@RanveerMaths09]

very soon

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Absolutely

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Sir theorem ke sath exercise bhi krrwaya krro kyoki usse jada samajh ata a hai

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all chapter's all exercises already done.

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Alternat opposite angle

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10:00

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Thnk uu
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