Geometry | Unit 7 | Lesson 10: Angles, Arcs, and Radii | Practice Problems

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CCSS.6.RP.A.3D

Tyler is confident that all circles are similar, but he cannot explain why this is true. Help Tyler explain why all circles are similar.

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Circle B is a dilation of circle A. What is the scale factor of dilation?

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CCSS.8.G.A.3

What is the length of the highlighted arc in circle A?

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CCSS.HSG.C.B.5

What is the length of the highlighted arc in circle B?

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CCSS.HSG.C.B.5

What is the ratio of the arc lengths?

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CCSS.HSG.C.B.5

How does the ratio of arc length compare to the scale factor?

• They are equal

• They are different

• The ratio is larger

• The scale factor is larger

• Undetermined

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CCSS.7.G.A.1

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CCSS.HSG.C.B.5

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CCSS.HSG.C.B.5

A circle with a shaded sector is shown. What is the area of the shaded sector?

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CCSS.HSG.C.B.5