Circle Theorems intro quiz

The central angle theorem states that: The angle at the centre  is ___________________ the angle at the circumference

• congruent to

• half

• double

• supplementary to 

Which one is a chord?

A line that intersects a circle at two points is a ______________.

• tangent
• secant
• diameter
• chord

Find the value of the angle marked x....

• 90

• 43

• 47

• 53

Which one is a diameter?

Find the angle marked x in each of these circles with centre O.

• 105

• 66

• 39

• 180

Find the value of the angle marked x....

• 50

• 100

• 80

• 90

A tangent to a circle is ________________________ to the radius drawn to the point of tangency.

• congruent
• perpendicular
• complimentary
• supplementary

If a is 60⁰ , what is 2a ?

• 30⁰
• 120⁰
• 90⁰

Which one is a radius?