Circle Arcs, Chords and Central Angles

In  a circle, if a radius or diameter is perpendicular to a chord, then it____ the chord and its arc.

• equals

• bisects

• arcs

• circles

Find x

• 10

• 5

• 18

• 9

Use chords to solve for x

• x = 3 cm

• x = 4 cm

• x = 5 cm

• x = 6 cm

If the endpoints of an arc lie on a diameter, the arc is a ....

• major

• minor

• semicircle

• sector

Equal chords subtend _________ angles at the centre.

• different angle

• equal

If two chords subtend equal angle at the centre then the chords are ______________

• Equal

• different

In circle X, chords AB and CD are congruent and AB is 9 units from X. Find the distance from CD to X.

• 4.5 units

• 9 units

• 18 units

• cannot tell

What is the part of the circle highlighted in red called?

• semi-circle arc

• major arc

• minor arc

• sector

The region between the a chord and either of the arcs is called____

• An arc

• A sector

• A segment

• A semi

Segments with endpoints on a circle are called _____.

• arcs

• radii

• chords

• polygons