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Exercise 12.1 que 1

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Exercise 12.1 que 1

    • Posted by Arkam Khan 2 years ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Shreya Pandey 1 year, 11 months ago

    Perimeter= 180 cm a+a+a=180 cm 3a=180 cm a=180/3 a=60 cm Semi perimeter = a+b+c/2 = 180/2 = 90/1 Semi perimeter = 90 cm Area = root S (s-a) (s-b) (s-c) = root 90 (90-60) (90-60) (90-60) = root 90×30×30×30 = root 3×30×30×30×30 = 30×30 root 3 = 900 root 3 cm²

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