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If radii of two circles are `4` and `3` and distance between centres is `sqrt(37)` then angle between the circles is

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Knowledge Check

  • R and r are the radii of two circles (R > r). If the distance between the centres of the two circles be d, then length of common tangent of two circles is

    A
    `sqrt(r^2 - d^2)`
    B
    `sqrt(d^2-(R-r^2))`
    C
    `sqrt((R - r)^2-d^2)`
    D
    `sqrt(R^2-d^2)`

  • If the radii of two circles is 6.5 cm and 9.3 cm then find the difference between the circumference of the circles.

    A
    17.6 cm
    B
    16.8 cm
    C
    19.2 cm
    D
    15.6 cm

  • The length of the chord of a circle is 8 cm and perpendicular distance between centre and the chord is 3 cm. Then the radius of the circle is equal to :

    A
    4 cm
    B
    5 cm
    C
    6 cm
    D
    8 cm

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    The condition for two circles with radii and r_(1) and r_(2) be the distance between their centre,such that the circles are orthogonal is

    Let C_(1) and C_(2) be two circles of unit radii, if the distance between the centers of two circles is 1, the common area of the circles is (api)/(b)+sqrt(b)/a . Then ab = ?

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    The circumferences of two circles are touching externally. The distance between their centres is 12 cm. The radius of one circle is 7 cm. Find the diameter (in cm) of the other circle.

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