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Complete IIT AIEEE ICSE ISC PMT help forum :: Maths :: Maths Question answer

try this simple Q

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tushar




try this simple Q Vide
PostSubject: try this simple Q try this simple Q EmptySat Nov 15, 2008 11:30 pm
Cool Razz How u can prove that the sum of angles of a triangle is 180 degreeeeeeeeeeee.
Prove by construction, not by formula of polygons:- (2*n-4)*180 dgree ,where n= number of sides
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abhas
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abhas


try this simple Q Vide
PostSubject: Re: try this simple Q try this simple Q EmptySun Nov 16, 2008 9:55 pm
try this simple Q Triangle1

construct B' A' || BA

now LB'CA =L A (Alt Ls)
LA'CB =L B (Alt Ls)

LB'CA +LA'CB + L C=180 (Supp. Ls)
=> A+B+C=180

HENCE PROVED....

I did this in class 6th or 7th i remember...... Very Happy
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Complete IIT AIEEE ICSE ISC PMT help forum :: Maths :: Maths Question answer-