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The radii of two circles with centres O ...

The radii of two circles with centres O and `O^(,)'` are 9 cm and 7 cm and the distance between their centres is 20 cm Then those circles will have _______ common tangents.

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Knowledge Check

  • From a point Q. the lent of tangent to a circle is 24cm and the distance of Q from the centre is 25cm. The radius of the circle is……..

    A
    7m
    B
    12cm
    C
    15cm
    D
    24.5 cm

  • In a circle with radius 5 cm, the length of a chord lying at distance 4 cm from the centre is ......... cm.

    A
    3
    B
    6
    C
    12
    D
    15

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