Circle Theorems

Find the size of angle BCD.

Find the size of y.

Find the size of x.

Find the size of angle y.

Which is the correct way to solve this?

• x=(142-72)/2
• x=(142+72)/2
• 72=(142-x)/2
• 72=(142+x)/2

• A
• B
• C
• D

Find the measure of ∠ABD

• 129⁰
• 51⁰
• 100⁰
• 65⁰

Line FG represents

• Tangent

• Radius

• Chord

• Diameter

What is the value of x and y?

• x=75°; y=93°
• x=65°;y=104°
• x=75°; y=94°
• x=65°; y=93

Find the measure of angle EFH.

• 61
• 65
• 114
• 130