Circles, Sector Area, Tangents, Chords, Secants

Line BD is a ________ of the circle.

• secant

• diameter

• tangent

• radius

Line BJ is a ______ of the circle.

• radius

• diameter

• tangent

• chord

If a radius is drawn to a point of tangency, what angle is formed between the radius and the tangent?

• 45 degrees

• 90 degrees

• 30 degrees

• 60 degrees

What is the measure of the angle formed outside the circle by two tangents, two secants, or a secant and a tangent?

• Depends on the specific configuration of the lines

• Equal to the sum of the angles of a triangle

• Half the difference of the intercepted arcs.

• Always 90 degrees

• A
• B
• C
• D

Find x

• 10

• 5

• 18

• 9

Find the value of x.

• 10

• 181

• 34

• 40

Where in the intersection of the secants shown?

• Inside the circle

• Outside the circle

• On the circle

• The secants do not intersect.

PA and PB are tangents of length 15cm to the circle with centre O. If PRO is a straight line with PR = 9cm, calculate the radius of the circle.

• 33
• 18
• 46
• 16