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9th CBSE
IMPORTANT
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The degree measure of a semi-circle is 180°.

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Important Questions on Circles

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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 1
The radius of a circle is 8 cm and the length of one of its chords is 12 cm. Find the distance of the chord from the centre.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 2
If the length of a chord which is at a distance of 5 cm from the centre of a circle of radius 10 cm is k cm, find the value of k nearest to two decimal places.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 3
Find the length of a chord which is at a distance of 4 cm from the centre of the circle of radius 6 cm.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 4
Give a method to find the centre of a given circle.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 5
Prove that a diameter of a circle which bisects a chord of the circle also bisects the angle subtended by the chord at the centre of the circle.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 6
A line segment AB is of length 5 cm. Draw a circle of radius 4 cm passing through A and B Can you draw a circle of radius 2 cm passing through A and B? Give reason in support of your answer.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 7
An equilateral triangle of side 9 cm is inscribed in a circle. If the radius of the circle is kk cm, then find the value of k.
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9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 15 - Circles>EXERCISE>Q 8
Given an arc of a circle, complete the circle.