Circles
Math ⇒ Geometry
Circles starts at 7 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Circles.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
A circle has a circumference of 44 cm. What is its diameter? (Use π = 22/7)
A circle has a radius of 10 cm. What is the area of a sector with a central angle of 90°? (Use π = 3.14)
A circle has a radius of 6 cm. What is the length of a chord that is 3 cm from the center?
A circle has an area of 154 cm². What is its radius? (Use π = 3.14)
A circle has a radius of 10 cm. What is the area of a sector with a central angle of 90°? (Use π = 3.14)
A circle has a radius of 6 cm. What is the length of a chord that is 3 cm from the center?
A circle with center O has a chord AB. If OA = OB = 8 cm and AB = 12 cm, find the distance from O to AB.
If the area of a sector of a circle is 25π cm² and the radius is 10 cm, what is the angle of the sector at the center?
Which of the following best describes a tangent to a circle? (1) Passes through the center (2) Touches the circle at exactly one point (3) Lies entirely inside the circle (4) Intersects the circle at two points
Which of the following is always true for a chord that passes through the center of a circle? (1) It is a tangent (2) It is a diameter (3) It is a radius (4) It is a secant
Which of the following is NOT a part of a circle? (1) Chord (2) Tangent (3) Vertex (4) Arc
Which of the following is NOT true about a circle? (1) All radii are equal (2) All diameters are equal (3) All chords are equal (4) The center is unique
A chord of a circle is a line segment whose endpoints are ________.
A sector of a circle is a region bounded by two radii and the included ________.
If the radius of a circle is doubled, its area becomes ______ times as large.
If two tangents are drawn to a circle from an external point, then the lengths of the tangents are ________.
True or False: A secant is a line that intersects a circle at exactly one point.
True or False: All diameters of a circle are equal in length.
True or False: The angle in a semicircle is always a right angle.
True or False: The area of a sector of a circle is proportional to the angle at the center.
