Angles and Circles

An angle in a circle with vertex on the circle itself

• Angle

• Central angle

• Inscribed angle

• Chord

An angle in a circle with vertex on the center of the circle

• Central angle

• Angle

• Inscribed angle

• Circle

The sum of the measures of the central angles in a circle is

• 0

• 90

• 180

• 360

Name the major arc

• BC

• BCD

• CD

• AB

Think about if the angles are equal or if they add up to 180. Solve for x. Plug it in.

Mathematical Equivalence

ON

Mathematical Equivalence

ON

What is the value of x and y?

• x=75°; y=93°

• x=65°;y=104°

• x=75°; y=94°

• x=65°; y=93

Find the value of x.

Mathematical Equivalence

ON

Solve for the missing angle.

• 45^o

• 90^o

• 22.5^o

• 128^o

• A
• B
• C
• D