Circles

What is the ratio of the circumference of a circle to its diameter called?

Which of the following is the longest chord of a circle?

What is the relationship between the central angle and the inscribed angle standing on the same arc?

What is the sum of the opposite angles of a cyclic quadrilateral?

A line which touches a circle at exactly one point is called a:

What is the angle subtended by a diameter at any point on the circumference?

If the radius of a circle is 7 cm, what is its circumference?

What is the area of a circle with diameter 14 cm?

The region bounded by a chord and an arc is called a:

How many tangents can be drawn to a circle from a point outside it?

In the given figure, O is the center. If angle AOB is 100 degrees, find angle ACB.

If angles in the same segment are given, they are always:

The angle between a tangent and the radius at the point of contact is:

A circle is divided into two equal parts by its diameter. Each part is called a:

If the circumference of a circle is 88 cm, find its radius.

What is the area of a quadrant of a circle with radius 7 cm?

In a cyclic quadrilateral ABCD, if angle A = 70 degrees, what is angle C?

The length of the arc of a semicircle with radius 'r' is:

A chord passing through the center of a circle is called:

If two circles touch each other internally, the distance between their centers is equal to: