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Parts of a Circle
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Which label is a radius?
m
y
x
w
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A diameter is a chord. Must be true, Could be true, or Cannot be true?
Must be true
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Okay!
Name the pictured part of the circle
Sector
Center
Arc
Central Angle
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Okay!
Name the pictured part of the circle
Arc
Central Angle
Sector
Center
Oops!
Okay!
Which label is a diameter?
x
m
y
w
Oops!
Okay!
Name the pictured part of the circle
Center
Arc
Central Angle
Sector
Oops!
Okay!
A central angle measures 90 degrees. Must be true, Could be true, or Cannot be true?
Could be true
Oops!
Okay!
What is JB?
Secant
Tangent
Chord
Radius
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Okay!
A chord is a diameter. Must be true, Could be true, or Cannot be true?
Could be true
Oops!
Okay!
Which label is a central angle?
w
y
x
m
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Okay!
What is a central angle?
an angle whose vertex is at the center of the circle
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Name the pictured part of the circle
Arc
Center
Central Angle
Sector
Oops!
Okay!
Which of the following is the formula for the AREA of a circle?
2πd
πr
πrr
2πr
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Which label is a chord that is not a diameter?
w
y
m
x
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Okay!
What is BD?
Tangent
Secant
Radius
Chord
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Okay!
What is AF?
Secant
Tangent
Chord
Radius
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Okay!
What is a chord
a line segment whose endpoints are on the circle
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Okay!
Name the pictured part of the circle
Radius
Sector
Chord
Diameter
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Okay!
Which of the following is the formula for the CIRCUMFERENCE of a circle?
πr
πrr
2πr
2πd
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Okay!
What is an arc?
the portion of a circle between 2 points on the circle
Oops!
Okay!
A radius is a chord. Must be true, Could be true, or Cannot be true?
Cannot be true
Oops!
Okay!
Name the pictured part of the circle
Diameter
Radius
Sector
Chord
Oops!
Okay!
What is DG?
Chord
Radius
Secant
Tangent
Oops!
Okay!
Name the pictured part of the circle
Chord
Diameter
Radius
Sector
Oops!
Okay!
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