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CBSE Class 9 Answered

what wiil be the effect on the area of the triangle if its all sides are doubled and how?prove it.
Asked by | 23 Jul, 2008, 05:07: PM
answered-by-expert Expert Answer

the  area of the triangle =  A  =  Sq. Rt of   s  (s-a) ( s-b) ( s-c) where  s =a+b+c / 2

when the sides are doubled  A1 = Sq. Rt   s1 (s1-a1 ) (s1-b1) ( s1-c1)

                                                           = S.q.Rt of 2s . 2x2x2 . s . (s-a)( s-b) ( s0c)  

                                                             = 4  Sq.Rt of  s  (s-a) (s-b) (s-c)

                                                           == 4A.

  WHEN THE SIDES ARE DOUBLED THE AREA  INCREASED BY 4 TIMES

Answered by | 24 Jul, 2008, 03:58: AM

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