Circles

If the circumference of a circle is 22 π ft, what is the radius?

• 22 ft
• 11ft
• π ft
• no ft

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

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

The definition of a circle is

• set of all points in a plain that are the same distance from a point called the center

• the distance around a share

• a large figure

• a pizza, orange, plum, or watermelon

What is the measure of arc AYB

• 50
• 100
• 180
• 260

How big is angle b?

• 50 degrees
• 60 degrees
• 70 degrees
• 75 degrees

What is the value of x with a reason?

• $112\degree$

• $56\degree$

• The angle at the center is equal to twice the angle at the circumference.

• The angle at the center is equal to the angle at the circumference.

Given: BCD is a diameter;  $Angle\ D\ is\ =\ 23\degree$  
What is the value of angle A with a reason?

•  $90\degree$  

•  $67\degree$  

• Angle in semicircle.

• angles on a straight line.

What is the value of angle D in the given circle? With a reason.
Given:  $Angle\ B\ is\ =27\degree$  

•  $27\degree$  

•  $54\degree$  

• Angle in the same segment.

• Interior angles in a triangle equal  $180\degree$  

Given: ABCD is a cyclic quadrilateral.
Are the following statements true or false?
 $a+b=180\degree$  
 $c+d=180\degree$  

• True

• False