class 8 math lesson 7 (geometry)

14
1 াগতম 1 গণিত ণিণিটাল াসে েবাইস

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  • 1

    1

  • 0

  • c

    db

    a

    DA

    EB

    F

    x

    C

  • ...

  • :

    , :() () () () ()

  • a

    bcd x

    -:

    c

    db

    a

    DA

    EB

    F

    x

    C

    : , a, b, c, d ab x

  • c

    db

    a

    DA

    EB

    F

    x

    C :(1) BE BC=a B (2) BF BA=b AC c d

    D (3) A, D C, D , ABCD -

    xEBF

    ABC

  • -.(Extra-)

    () 4 . , 3 . , 3.5 . , 4.5 . 60

  • () 3 . , 3.5 . , 2.8 . 3 . 45

  • . ?2. ?. 45 60

  • -:

    () 4 . , 3 . , 3.5 . , 4.5. 60