Chord, its distance from the centre and the radius: r^2 = d^2 + (c/2)^2

1. A.
   $3 + \sqrt{10} : 3 - \sqrt{10}$
2. B.
   $3 + \sqrt{8} : 3 - \sqrt{8}$
3. C.
   $3 + \sqrt{3} : 3 - \sqrt{3}$
4. D.
   $3 : \sqrt{3}$

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1. A.
   5 cm
2. B.
   5.5 cm
3. C.
   6.5 cm
4. D.
   7 cm

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1. A.
   25 m
2. B.
   27 m
3. C.
   29 m
4. D.
   31 m

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1. A.
   3.5 cm
2. B.
   7 cm
3. C.
   10.5 cm
4. D.
   14 cm

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1. A.
   24 cm
2. B.
   25 cm
3. C.
   26 cm
4. D.
   30 cm

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