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The radii of two concentric circles are 13 and 8.A chord of the outer circle touches the inner circle. Find the length of that cho

By Arianna

The radii of two concentric circles are 13 and 8.A chord of the outer circle touches the inner circle. Find the length of that chord​

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Arianna

2\left(x2+\frac{1}{x2}\right)-5\left(x+\frac{1}{x}\right)-14=0?

A storekeeper earns a profit of 250 on sale of one television and a loss of 150on sale of one laptop The storekeeper sells 5700 t

2 thoughts on “The radii of two concentric circles are 13 and 8.A chord of the outer circle touches the inner circle. Find the length of that cho”

  2. Step-by-step explanation:

    Fromthefigure

    ODistheradiusofsamllercircle

    andBDisthetangenttothesmallercircle

    so,OD⊥BD

    ∴∠ODB=90

    ∘

    and,

    InthebiggercirclePisapointinthesemi−circleofthebiggercircle

    ∴∠APB=90

    ∘

    InΔABPandΔOBD

    ∠APB=∠ODB=90

    ∘

    ∠ABP=∠ODB(common)

    ΔABP∼ΔOBD(AAsimilarity)

    Now,

    OD

    AP

    =

    OB

    AB

    8

    AP

    =

    13

    26

    AP=2×8

    =16 cm

    Reply

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