Circles — Practice Quiz
ICSE · Class 8 · Mathematics
Try a 4-question quiz on Circles for ICSE Class 8 Mathematics: tap an answer to check it and see why. 61 questions in the full chapter test.
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Quick Quiz: Circles
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A circle has radius 8 cm. Find its diameter.
A circle has diameter 30 cm. Find its radius.
In a circle, diameter CD is 18 cm. What is the radius?
A circle has radius 12 cm. What is the length of its diameter?
Sample Questions
A circle has diameter 16 cm. A chord in the same circle measures 20 cm. What can be said about this chord?
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It is impossible because it is longer than the diameter
1. The diameter is the longest chord. 2. The diameter here is 16 cm. 3. A chord of 20 cm is longer than 16 cm. 4. So such a chord cannot be drawn.
The distance of point P from the centre of a circle is 18 cm. The radius is 12 cm. Where does point P lie?
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In the exterior
1. A point in the exterior has distance from the centre greater than the radius. 2. Here, OP = 18 cm and radius = 12 cm. 3. Since 18 > 12, point P lies in the exterior.
The distance of point Q from the centre of a circle is 12 cm. The radius is 12 cm. Where does point Q lie?
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On the circumference
1. A point lies on the circumference when its distance from the centre is equal to the radius. 2. Here, OQ = 12 cm and radius = 12 cm. 3. Since the two are equal, Q lies on the circumference.
The distance of point R from the centre of a circle is 9 cm. The radius is 12 cm. Where does point R lie?
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In the interior
1. A point in the interior has distance from the centre less than the radius. 2. Here, OR = 9 cm and radius = 12 cm. 3. Since 9 < 12, point R lies in the interior.
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