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Developing a sense of scale

Resource:
Developing a sense of scale

Focus on proportions and proportional relationships between similar figures.

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• Unit 3

#### Similarity and Proof

Dilate Triangles

Resource:
Dilate Triangles

Students will dilate triangles using a compass.  Students will analyze the relationship between angle measures and segment/side lengths of pre-images and images.

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• Unit 3

#### Similarity and Proof

Dilating a cartoon character

Resource:
Dilating a cartoon character

Students will use a comass to dilate an image.  Then students will analyze the properties of a dilation based on their images.

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• Unit 3

#### Similarity and Proof

Dilations with a rubber band

Resource:
Dilations with a rubber band

Students will perform a dilation of an image using rubber bands.

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• Unit 3

#### Similarity and Proof

FAL: Drawing to scale: A garden

Resource:
FAL: Drawing to scale: A garden

An FAL that focuses on scale factor and similar figures.

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• Unit 3

#### Similarity and Proof

GeoGebra Slider SSS Similar Triangles

Resource:
GeoGebra Slider SSS Similar Triangles

Slider that shows the 3 sides of the smaller triangle in proportion to the 3 sides of the larger triangle.  Triangles have the center of dilation as the vertex of 1 angle.

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• Unit 3

#### Similarity and Proof

GeoGebra slider that shows dilated triangles with varying scale factors

Resource:
GeoGebra slider that shows dilated triangles with varying scale factors

Slider that shows an original triangle and the dilated similar triangle.  The slider represents the scale factor.

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• Unit 3

#### Similarity and Proof

GeoGebra Slider Visualizing a Dilation

Resource:
GeoGebra Slider Visualizing a Dilation

GeoGebra slider that shows a triangle dilation changing as the scale factor changes.

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• Unit 3