circles and chord

The perpendicular bisector of a chord passes through the _________ of a circle. What is the missing word?

•  radius

•  centre

•  area

• none of these

The _________ bisector of a chord passes through the center of a circle. What is the missing word?

• parallel

• tangential

• A line

• perpendicular

A chord is cut in half by the diameter of a circle. What angle is the chord to the diameter?

• 20

• 90

• 45

• 180

True or false? A line that passes through the center of a circle will bisect any chord.

• True

• false

True or false? A radius cuts a chord perpendicularly. It bisects the chord.

• true

• false

What is a chord?

• A line segment that has its endpoints on the circle

• A region bounded by two radii and the arc lying between the radii

• A line that touches the circle at one point

• None of these

What does it mean for a line to bisect the chord?

• It is a chord

• It meets the chord at 90°

• It cuts the chord in half

• None of these

When will a radius bisect a chord?

• When it is parallel to the chord

• When it is perpendicular to the chord

• Never

When will a diameter be perpendicular to a chord?

• When it bisects the chord

• When it passes through the center of a chord

• Never

What is the missing length shown in the circle below?

• 2cm

• 4cm

• None of these