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 8
If the radius of a circle is doubled, how does the area change?
What is the formula for the area of a circle in terms of its radius r?
What is the formula for the circumference of a circle in terms of its radius r?
What is the name of the angle whose vertex is at the center of the circle and whose sides are radii?
What is the name of the line segment that passes through the center of a circle and has its endpoints on the circle?
What is the name of the part of a circle between two points on the circle?
What is the relationship between the radius and the diameter of a circle?
A circle with center O has a radius of 8 cm. What is the length of a diameter?
A sector of a circle is best described as:
(1) A part of the circumference
(2) A region bounded by two radii and an arc
(3) A line segment inside the circle
(4) The entire circle
Which of the following best describes a secant?
(1) A line that touches the circle at one point
(2) A line that passes through the center
(3) A line that intersects the circle at two points
(4) A line segment inside 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 always true for a circle?
(1) All radii are equal
(2) All chords are equal
(3) All tangents are equal
(4) All secants are equal
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 distance from the center of a circle to any point on the circle is called the ________.
The longest chord of a circle is the ________.
If a chord is equal in length to the radius of a circle, is it a diameter?
True or False: A chord always passes through the center of a circle.
True or False: A tangent to a circle touches the circle at exactly one point.
True or False: All diameters of a circle are equal in length.
