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Math Help - Trig and geometry: the area, perimeter and size of a cyclic quadrilateral

  1. #1
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    Trig and geometry: the area, perimeter and size of a cyclic quadrilateral

    Please help

    ABCD is a cyclic quadrilateral with <DAB=100, AB=7cm and BC= 8cm

    i) the size of <BCD
    ii) the size of <ADC
    iii)the perimeter of the quadrilateral
    iv)The area of the quadrilateral

    I know that in geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle.

    Help is greatly appreciated
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  2. #2
    MHF Contributor
    Grandad's Avatar
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    Hello atom360
    Quote Originally Posted by atom360 View Post
    Please help

    ABCD is a cyclic quadrilateral with <DAB=100, AB=7cm and BC= 8cm

    i) the size of <BCD
    ii) the size of <ADC
    iii)the perimeter of the quadrilateral
    iv)The area of the quadrilateral

    I know that in geometry, a cyclic quadrilateral is a quadrilateral whose vertices all lie on a single circle.

    Help is greatly appreciated
    Please check the question. It's impossible to answer with the information you've given (except for part (i), which is 80^o). There are infinitely many cyclic quadrilaterals with different shapes and sizes that can be drawn with these dimensions.

    Grandad
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