Adaptive Practice
Circles
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Question 1 of 10
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Easy
What is the length of the diameter of a circle whose radius is 7 cm?
Easy
If the circumference of a circle is 44 cm, what is its radius? (Use π = 22/7)
Medium
The length of an arc of a circle with radius 14 cm is 22 cm. Find the angle subtended by the arc at the centre (in degrees).
Easy
Two circles touch each other externally. If the sum of their radii is 17 cm, what is the distance between their centres?
Medium
A chord of length 24 cm is drawn in a circle of radius 13 cm. Find the distance of the chord from the centre of the circle.
Medium
If the radius of a circle is increased by 20%, by what percentage does the area increase?
Hard
In a circle, two chords AB and CD intersect each other at point E. If AE = 3 cm, EB = 5 cm, and CE = 4 cm, find ED.
Medium
The length of a tangent from a point 25 cm away from the centre of a circle is 24 cm. Find the radius of the circle.
Medium
A sector of a circle has an area of 154 cm² and the radius of the circle is 14 cm. Find the angle of the sector in degrees.
Hard
Two concentric circles have radii 21 cm and 14 cm. Find the length of the chord of the larger circle which touches the smaller circle.