radius circumference central angles

How many degrees are in a cirlce?

• 90

• 180

• 270

• 360

What best describes segment AB?

• chord

• secant

• tangent

• diameter

Solve for the missing angle.

• 45^o

• 90^o

• 22.5^o

• 128^o

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2

• Divide the diameter by 2

• Add 2 to the diameter

• Subtract 2 from the diameter

A _____ is half of a circle.

• circumference

• pi

• semicircle

•  composite figure

Name a major arc in circle O.

• AB

• CDA

• CB

• CBA

what's a Central Angle?

• angle that forms 2 radii meet at the center of a circle 

• multiple angles 

• 3 angles that form and meet at the center of the circle 

• all of the above 

What is the measure of arc AB?

• 140

• 142

• 180

• 153

What is the value of x?

• x = 160

• x = 40

• x = 80

• x = 360

What is the measure of arc AYB

• 50

• 100

• 180

• 260