CBSE Class 9 Answered

the perimeter of two similr triangle ABC and PQR are respectively 40 cm and 60 cm. If PQ=12 cm then find ar ABC/ ar PQR

Asked by wierdtechs | 16 Jul, 2018, 08:28: PM

Expert Answer

Acording to the question,

begin mathsize 16px style fraction numerator Perimeter open parentheses increment ABC close parentheses over denominator Perimeter open parentheses increment PQR close parentheses end fraction equals AB over PQ 40 over 60 equals AB over 12 AB space equals space 40 over 60 cross times 12 equals 8 space cm fraction numerator begin display style Ar open parentheses increment ABC close parentheses end style over denominator begin display style Ar open parentheses increment PQR close parentheses end style end fraction equals fraction numerator begin display style AB squared end style over denominator begin display style PQ squared end style end fraction equals open parentheses 8 over 12 close parentheses squared equals 4 over 9 end style

Answered by Sneha shidid | 17 Jul, 2018, 09:38: AM

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