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Circles Test - 4

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Circles Test - 4
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  • Question 1
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    A regular decagon (with 10 sides) is inscribed in a circle. The angle that each side of the decagon subtends at the centre is

  • Question 2
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    A telegraph wire spans 20 m with a dip at the centre of 5 cm. Assuming the wire is in the form of a circular arc, its radius is

  • Question 3
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    The length of a chord of a circle is equal to the radius of the circle. The angle which this chord subtends on the longer segment of the circle is equal to

  • Question 4
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    The length l of a tangent, drawn from a point A to the circle is 4/3 of the radius r. The distance from A to the centre of circle is

  • Question 5
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    Two concentric circles are of radii 20 cm and 13 cm respectively. A line PQRS cuts one circle at P and S and the other at Q and R. If QR = 10 cm, then PS is equal to

  • Question 6
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    A circle with radius 4 units is intersected by a line at points R and T. The maximum possible distance between R and T is

  • Question 7
    1 / -0

    Maximum number of common tangents that could be drawn to two given circles is __

    Solution

    Maximum number of common tangents that could be drawn to two given circles is
    4 if circles are far apart.
    3 if they are touching externally.
    2 if they intersect each other.
    1 if they are touching internally.
    0 if one is inside the other and don't touch each other.

     

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