Circle Rules Geometry

What is the value of x with a reason?

• 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.

What is the value of AB?

• 4

• 8

• 10

• 6

Name a chord.

• Segment XC

• Segment KM

• Segment HJ

• LINE BD

If a line segment in drawn from the center of a circle onto a chord, what happens with the chord?

• The chord disappears.

• The chord is bisected.

• The angles are 90 degrees.

• The line from the center is perpendicular to the chord.

• 90^o

• 180^o

• 100^o

• 80^o

Point M is the center of the circle shown. Find the measure of angle ZMY.

• 44

• 46

• 88

• 92

Find a and b.

• a=74 degrees
  b=93 degrees

• a=93 degrees
  b=74 degrees

• a=87 degrees
  b=106 degrees

• a=106 degrees
  b=87 degrees

Find the measure of angle ADB.

• 47.5

• 85

• 132.5

• 180

what formula matches the picture?

• xy = wz

• (x + y) * x = (w + z) * w

• x^2 = (y + z) * y

• x = y

If a line is drawn from the center of a circle to the chord and it bisects the chord, what will the relationship between this line and the chord be?

• They will be perpendicular

• They will be parallel

• They will be equal

• The chord will be bisected