Circles and other Related Terms

It is a set of points that are equidistant to a fixed point.

• Diameter

• Radius

• Circle

• Equilateral triangle

It joins two points on the circle and passes through the center.

• Radius

• Diameter

• Tangent line

• Radii

A chord is diameter.

• Always True

• Never True

• Sometimes true

It intersects the circle at exactly two points.

• Tangent line

• Secant line

• Perpendicular line

• Straight line

It is the measure of a semicircle.

An angle whose vertex is on the circle.

• Inscribed angle

• Central angle

• Vertex angle

• Right angle

If segment AC is the diameter of circle B and measure of segment BC is 6.25 cm, what is the measure of segment AC?

• 6.25 cm

• 12 cm

• 12.5 cm

• 3.125 cm

An angle whose sides are two radii of the circle.

• Central angle

• Inscribed angle

• Vertex angle

• One revolution

Which of the following statements is true?

• The measure of an inscribed angle is twice the measure of its intercepted arc.

• The measure of the central angle is one half the measure of its intercepted arc.

• The central and inscribed angle of a circle always has the same measure.

• The measure of a central angle is equal to the measure of its intercepted arc.