circle 01

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is the diameter?

• 8
• 16
• 10
• 4

what is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

The diameter of a circle is:

• The measurement around the circle.
• The distance from an edge of a circle to another edge.
• The distance from the center of the circle to an edge of a circle
• The distance from an edge of a circle to another edge through the center. 

A tangent is a line that touches a circle at just one point and forms a right angle with the circle's radius.

• True
• False

A line in that intersects the circle at exactly one point is a ____________.

• tangent
• secant
• chord
• radius

Name a radius.

• DE
• GA
• CB
• AB

Find x

• 10
• 5
• 18
• 9

Find the radius r

• 2
• 3
• 4
• 5

Is line AB tangent to the circle?
Hint:  is a right triangle formed?

• YES
• NO
  NO
• Can't Tell
  Can't Tell