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 9
Explain the difference between a chord and a diameter.
Explain what is meant by a concentric circle.
If the radius of a circle is doubled, by what factor does the area increase?
State the relationship between the radius and the tangent at the point of contact.
What is the formula for the circumference of a circle in terms of its radius r?
What is the locus of all points in a plane that are at a fixed distance from a given point?
What is the measure of the angle subtended by a semicircle at the center of the circle?
What is the name of the line segment that passes through the center of a circle and has its endpoints on the circle?
A sector of a circle is best described as: (1) A region bounded by two radii and an arc (2) A region bounded by a chord and an arc (3) A region outside the circle (4) A line passing through the center
Which of the following best describes a minor arc? (1) An arc less than half the circle (2) An arc equal to half the circle (3) An arc more than half the circle (4) An arc outside the circle
Which of the following is a property of a tangent to a circle? (1) It passes through the center (2) It touches the circle at two points (3) It is perpendicular to the radius at the point of contact (4) It is always inside the circle
Which of the following is NOT a part of a circle? (1) Chord (2) Tangent (3) Vertex (4) Arc
A chord of a circle is a line segment whose endpoints are ________.
A line that intersects a circle at two points is called a ________.
The area of a circle is given by the formula ________.
The distance from the center of a circle to any point on the circle is called the ________.
If the length of a chord is equal to the radius of the circle, is the chord a diameter?
True or False: All circles are similar to each other.
True or False: All diameters of a circle are equal in length.
True or False: The area of a sector of a circle is always less than the area of the circle.
