Finding Measures of Central Angles

Find the measure of arc JL.

• 127 degrees

• 233 degrees

• 133 degrees

Solve for the missing angle.

Mathematical Equivalence

ON

What is the measure of \angle QSP ?

What is the measure of ∠AOB?

• 40°

• 80°

• 160°

• 50°

• a
• b
• c
• d

Solve for the missing angle.

• 45^o

• 90^o

• 22.5^o

• 128^o

An angle whose vertex is at the center of the circle.

• Central Angle

• Inscribed Angle

• Radius

• Sector

Which number best represents a Central Angle?

• 1

• 4

• 8

• 9