Adaptive Practice
Circle
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Easy
What is the length of the diameter of a circle with radius 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 is 11 cm and the radius of the circle is 7 cm. What is the measure of the central angle in degrees? (Use π = 22/7)
Hard
Two chords AB and CD of a circle intersect each other at right angles. If AB = 8 cm and CD = 6 cm, what is the length of the segment AO if O is the point of intersection and AO = BO?
Medium
The radius of a circle is increased by 20%. By what percent does the area of the circle increase?
Medium
If the length of a chord of a circle is equal to the radius of the circle, what is the distance of the chord from the center?
Medium
In a circle of radius 14 cm, a chord is 24 cm long. What is the distance of the chord from the center?
Medium
Two circles touch externally. If the sum of their radii is 30 cm and the distance between their centers is 30 cm, what is the length of their common tangent?
Hard
A chord of length 16 cm is drawn in a circle of radius 10 cm. Find the length of the minor arc corresponding to the chord. (Use π = 3.14)
Medium
The area of a sector of a circle with radius 14 cm is 154 cm². Find the length of the corresponding arc. (Use π = 22/7)