Circle Quiz 9

Question 1

The length of a tangent from a point d cm away from the centre of a circle of radius &lsquo;r&rsquo; is

Accepted Answer

$\sqrt {d^2-r^2}$

Answer

$\sqrt {d^2 + r^2}$

Answer

$\sqrt {dr}$

Answer

$\sqrt {d+r}$

Question 2

Two concentric circles are of radii a and b (a>b). Length of the chord of the larger circle which touches the small circle is

Accepted Answer

$2 \sqrt{a^2-b^2}$

Answer

$\sqrt{a^2-b^2}$

Answer

$2\sqrt{a^2 + b^2}$

Answer

$\sqrt{a^2 + b^2}$

Question 3

If AP and AQ are two tangents to a circle with centre O so that $\angle POQ $= 110&deg;, then $\angle PAQ$ =

Accepted Answer

70&deg;

Answer

60&deg;

Answer

80&deg;

Answer

90&deg;

Question 4

The shaded portion represents

Accepted Answer

Minor segment

Answer

Major segment

Answer

Centre

Answer

Sector

Question 5

Number of chords of a circle is

Accepted Answer

infinite

Answer

1

Answer

2

Answer

3

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