Circles

If the area of a circle is 154 sq. cm, find its circumference.

The region bounded by two radii and an arc is called:

If the distance of a point from the center of a circle is less than the radius, where does the point lie?

What is the total degree measure of a circle?

A tangent to a circle is _____ to the radius through the point of contact.

The longest chord of a circle is its:

How many circles can pass through three non-collinear points?

If a chord AB of a circle is equal to the radius of the circle, what is the angle subtended by the chord at the center?

The distance from the center of a circle to a chord is called:

If the radii of two circles are 3 cm and 4 cm, and the distance between their centers is 7 cm, they touch each other:

A line that intersects a circle at only one point is a:

If O is the center of the circle and angle AOB = 110 degrees, find angle ACB (where C is on the major arc).

What is the ratio of circumference to diameter of any circle?

An exterior angle of a cyclic quadrilateral is equal to its:

How many common tangents can be drawn to two non-intersecting circles that are far apart?

The area of a quadrant of a circle with radius 'r' is:

In a circle with center O, chord AB = 8 cm and the perpendicular distance from O to AB is 3 cm. Find the radius of the circle.

In the given figure, O is the center. If angle OAB = 30 degrees, find angle ACB.

If PQ and PR are two tangents to a circle with center O such that angle QPR = 50 degrees, what is angle QOR?

Two chords AB and CD of a circle intersect at E. If AE = 4 cm, EB = 6 cm, and CE = 3 cm, find the length of ED.