Adaptive Practice
Circles
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Question 1 of 10
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Easy
What is the radius of a circle whose diameter is 14 cm?
Easy
The circumference of a circle is 44 cm. What is its radius? (Use π = 22/7)
Easy
If the area of a circle is 154 cm², find its radius. (Use π = 22/7)
Medium
Two circles touch each other externally. If their radii are 5 cm and 3 cm, what is the distance between their centers?
Medium
A chord of length 24 cm is at a distance of 7 cm from the center of a circle. Find the radius of the circle.
Medium
The length of an arc of a circle with radius 14 cm is 44 cm. Find the measure of the central angle in degrees. (Use π = 22/7)
Hard
In a circle, two chords of lengths 6 cm and 8 cm are equidistant from the center. Which chord is closer to the center?
Medium
The radius of a circle is increased by 20%. By what percent does the area increase?
Medium
A sector of a circle has an area of 154 cm² and a radius of 14 cm. Find the angle of the sector in degrees. (Use π = 22/7)
Hard
Two concentric circles have radii 21 cm and 7 cm. Find the length of the chord of the larger circle which touches the smaller circle.