Unit

#### Description:

Circles and SimilaritySean has two circles, one with a radius of 1 inch and another with a radius of 3 inches.What is the ratio between the radii of the circles?What is the scale factor between the two circles?What is the ratio between the circumferences of the circles?What is the ratio between the areas of the circles?What do area ratios and circumference ratios have to do with scale factor?Lessons, videos, exercises, and text from CK-12. Additional resources available at this site.

#### Subjects:

• Mathematics > General
• Mathematics > Geometry

similar circle

English

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#### Collections:

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Update Standards?

#### CCSS.Math.Practice.MP2: Common Core State Standards for Mathematics

Reason abstractly and quantitatively.

#### CCSS.Math.Practice.MP3: Common Core State Standards for Mathematics

Construct viable arguments and critique the reasoning of others.

#### CCSS.Math.Practice.MP6: Common Core State Standards for Mathematics

Attend to precision.

#### CCSS.Math.Practice.MP7: Common Core State Standards for Mathematics

Look for and make use of structure.

#### CCSS.Math.Content.HSG-C.A.1: Common Core State Standards for Mathematics

Prove that all circles are similar.
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