Circle Theorems

The angle in a semi-circle is ___________

• equal

Tags

CCSS.HSG.C.A.2

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

• 90

• 43

• 47

• 53

Tags

CCSS.HSG.C.A.2

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

• 90

• 45

• 50

• 100

Tags

CCSS.HSG.C.A.2

The angles in the same segment from a common chord are:

• equal

• 30 degrees

• add up to 90 degrees

Tags

CCSS.HSG.C.A.2

What is the size of angle x?

• 19^o
• 76^o
• 39^o
• 38^o

Tags

CCSS.HSG.C.A.2

The angle at the centre (y) is _______ the angle (x) at the circumference.

• twice

• half

• equal to

• 90 degrees

Tags

CCSS.HSG.C.A.2

find the measure of angle a

• 30
• 21
• 60
• 120

Tags

CCSS.HSG.C.A.2

What are the sizes of a and b?

• a = 57, b = 114

• a = 57, b = 57

• a = 114, b = 57

• a = 57, b = 28.5

Tags

CCSS.HSG.C.A.2

What best describes segment AB?

• chord
• secant
• tangent
• diameter

The radius through the midpoint of a chord bisects it at

• 180 degrees

• a third

• 90 degrees

• twice the angle at the circumference.