Mathematics-Circles [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 1 - 6 of 99

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Question 1

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Question

MCQ▾

O is the center of a circle and if then is equal to

Image of a Circle Having Center O and Sum of Two Angles

Choices

Choice (4)Response
a.
b.
c.
d.

Question 2

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Question

MCQ▾

A chord of a circle is 8 cm in length and its distance from the center is 3 cm. Find the length of the chord of the same circle which is at a distance of 4 cm from the center.

Choices

Choice (4)Response
a.10 cm
b.12 cm
c.6 cm
d.8 cm

Question 3

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Question

MCQ▾

The diameter is

Choices

Choice (4)Response
a.Three times radius of circle
b.Smallest chord of a circle
c.Greatest chord of a circle
d.None of the above

Question 4

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Question

MCQ▾

A regular nonage (9 sides) is inscribed in a circle. The angle that each side of the decagon subtends at the center is

Choices

Choice (4)Response
a.
b.
c.
d.

Question 5

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Question

MCQ▾

The radius of a circle is 2.5 cm. AB and CD are two parallel chords 2.7 cm apart. If cm then CD is equal to

Choices

Choice (4)Response
a.5.2 cm
b.3 cm
c.7.3 cm
d.8 cm

Question 6

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Question

MCQ▾

AB is a chord of a circle of radius 3.4 cm and P is a point on it which divided it into two parts in the ratio 3: 5. If P is 2.7 cm distant from the center O, the length of AB is

Choices

Choice (4)Response
a.4.24 cm
b.9.16 cm
c.5.9 cm
d.2.12 cm