circles

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

Say 'TRUE' or 'FALSE'
The diameter is the longest chord of a circle

• TRUE
• FALSE

• ∠APB + ∠AQB = 180°

• ∠APB + ∠AQB = 90°

• ∠APB = ∠AQB

• None of the above

• 50°
• 45°
• 60°
• 40°

A ____ drawn from the centre of a circle to the chord, bisects the chord.

• Arc

• Angle

• Perpendicular line

• Diagonal

Determine the measure of ∠UVS

• 19.5°

• 39°

• 78°

• 102°

Find the measure of arc NL

• 21°

• 42°

• 45°

• 84°

If you are given a radius and asked to find the diameter what do you do?

• Divide the radius by 2

• Square the radius

• Multiply the radius by 2

• Take the square root of the radius

What part of the circle is present?

• Tangent

• Secant

• Chord

• Diameter

• Name the circle: Circle B
• Name the circle: Circle DE
• Name the circle: Circle A
• Name the circle: Circle DBC