Circle Theorem

Find x.

• 38

• 21

• 27

• 96

Determine y.

• 30

• 60

• 90

• 180

Which circle theorem rule is used to find angle x?

• The angle at the circumference in a semicircle is 90°

• Inscribed angles that intersect the same arc are congruent.

• A tangent meets a radius at 90°
  

• The central angle is twice the inscribed angle of the same arc.

Find the m<WUX.

• 130°

• 47°

• 40°

• 92°

What is the value of x?

• 92

• 25

• 12.5

• 105

Triangle ABC is inscribed in circle O. Line AB is a diameter, and the measure of angle ABC is 55°. What is the measure of angle BAC?

• 90^o

• 35^o

• 45^o

• 55^o

Lines AO and BO are tangent. What is the measure of BO?

• 20

• 15

• 10

• 5

Find a.

• 30

• 21

• 60

• 120

Determine x.

• 32

• 16

• 64

• 21

What is d?

• 78

• 102

• 117

• 21