Secant Theorems and Inscribed Angles

What is the measure of arc AB?

• 44

• 22

• 88

• 55

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

Find a.

• 30

• 21

• 60

• 120

Determine y.

• 30

• 60

• 90

• 180

Determine x.

• 32

• 16

• 64

• 21

What is d?

• 78

• 102

• 117

• 21

Calculate q.

• 40

• 140

• 128

• 52

Find m<A.

• 63

• 21

• 44

• 85

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

• tangent

• secant

• diameter

• chord

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.