Circle Vocabulary and Circumference

• Secant
• Diameter
• Radius
• Chord

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CCSS.HSG.C.A.2

CCSS.HSG.C.A.3

CCSS.HSG.CO.A.1

• diameter
• radius
• center

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CCSS.HSG.C.A.2

• center
• diameter
• radius

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CCSS.7.G.B.4

• center
• diameter
• radius

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CCSS.HSG.C.A.2

The definition of a true circle is:

• A set of points in a plane that are all the same distance from a given point, called the center.

• A round looking polygon with 360 degrees.

• Any polygon with curved lines.

• A plane figure that looks like a smashed basketball.

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CCSS.HSG.CO.A.1

A segment that has one endpoint at the center and the other endpoint on the circle is called:

• Diameter

• Circumference

• Radius

• Chord

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CCSS.HSG.C.A.2

A segment that passes through the center and has both endpoints on the circle is:

• Diameter

• Circumference

• Radius

• Arc

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CCSS.HSG.C.A.2

The radius is ___________ the length of the diameter.

• twice

• half

• three times

• equal to

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CCSS.7.G.B.4

CCSS.7.RP.A.2

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

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CCSS.5.G.B.3

CCSS.5.G.B.4

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

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CCSS.7.G.B.4