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25 If △ABC ~ △DEF and …

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25 If △ABC ~ △DEF and area ( △ABC ) = 64 square unit , area(△DEF) = 144 sq. units and AB = 4 unit then DE is (2 Points) 6 unit 12 unit 8 unit 10 unit

    • Posted by Nancy Shetty 5 years, 1 month ago

    CBSE > Class 10 > Mathematics
    • 1 answers

    Yogita Ingle 5 years, 1 month ago

     △ABC ~ △DEF

    a(△ABC)/a( △DEF) = AB2 /DE2

     64/144 =42/DE2

    8/12 = 4/DE

    8DE = 48

    DE = 48/8 = 6 unit

     

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