HSG-SRT.A.2

Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

 
16 Lesson(s)
   

Transformations + Similarity

Geometry » Unit: Sweet Similar Shapes
Geometry » Unit: Sweet Similar Shapes
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will use a pair-share activity and activate their prior knowledge to discover how transformations connect to AA criterion.

 
Favorites (6)
 
Resources (16)
 
Reflections (1)
quilt transformations and similarity
   

Finally Finals #1

Geometry » Unit: Finally Finals
Geometry » Unit: Finally Finals
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

It's time for Jeopardy! In this review lesson, students will play Jeopardy to review key topics covered in the Geometry curriculum like transformations and perpendicular bisectors.

 
Favorites (5)
 
Resources (10)
final image
   

Introduction to Similar Figures

Geometry » Unit: Similar Figures
Geometry » Unit: Similar Figures
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

What are dilations good for? Let's look at similar figures!

 
Favorites (26)
 
Resources (10)
working with similar
   

Discovering Similar Triangles

Geometry » Unit: Sweet Similar Shapes
Geometry » Unit: Sweet Similar Shapes
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Completing a hands-on activity, students will cut, categorize and discover properties of similar triangles.

 
Favorites (18)
 
Resources (29)
 
Reflections (5)
isos triangles with colors
   

Dilation Nation

Geometry » Unit: Transformers and Transformations
Geometry » Unit: Transformers and Transformations
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will review transformations using a brain pop and learn how to geometrically enlarge and shrink shapes.

 
Favorites (3)
 
Resources (15)
tigers dilating
   

More Discovering Similar Triangles

Geometry » Unit: Sweet Similar Shapes
Geometry » Unit: Sweet Similar Shapes
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will finish discovering key properties of similar triangles and will practice identifying if two shapes are similar.

 
Favorites (2)
 
Resources (14)
more discovering triangles image
   

Similar Triangle Practice

Geometry » Unit: Similarity in Triangles
Geometry » Unit: Similarity in Triangles
Marisa Laks
New York, NY
Environment: Urban
 
Big Idea:

In this lesson, students apply the properties and theorems studied throughout the unit to justify that triangles are similar.

 
Favorites (2)
 
Resources (17)
practice with similar triangles image
   

Review Day for Sweet Similar Shapes

Geometry » Unit: Sweet Similar Shapes
Geometry » Unit: Sweet Similar Shapes
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will use the SMART Clickers to review key topics for this unit like, identifying similar shapes, and then complete a practice test.

 
Resources (14)
review day image
   

Assessment for Sweet Similar Shapes

Geometry » Unit: Sweet Similar Shapes
Geometry » Unit: Sweet Similar Shapes
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will be assessed on their knowledge of similarity on a test or problem set.

 
Favorites (1)
 
Resources (12)
 
Reflections (1)
assessment sweet similar shapes image
   

End of Year Assessment

Geometry » Unit: Final Assessment
Geometry » Unit: Final Assessment
Marisa Laks
New York, NY
Environment: Urban
   

Definition of Similarity and Similar Triangles

Geometry » Unit: Triangle Similarity and Trigonometric Ratios
Geometry » Unit: Triangle Similarity and Trigonometric Ratios
Jessica Uy
Sunnyvale, CA
Environment: Suburban
 
Big Idea:

Students' prior knowledge of transformations and congruence helps them make connections as they learn to use similarity shortcuts.

 
Favorites (1)
 
Resources (28)
 
Reflections (3)
similar figures picture li
   

Radian measure Day 2 of 2

12th Grade Math » Unit: Trigonometry as a Real-Valued Functions
12th Grade Math » Unit: Trigonometry as a Real-Valued Functions
Katharine Sparks
Independence, MO
Environment: Suburban
 
Big Idea:

Through sharing of problem solving strategies students will develop a description for measuring angles in radians and use the relationship with degrees to find special angles.

 
Favorites (1)
 
Resources (17)
radian
   

Triangle Similarity Criteria

Geometry » Unit: Similarity
Geometry » Unit: Similarity
Anthony Carruthers
Pasadena, CA
Environment: Suburban
 
Big Idea:

Enough is enough...but what is enough? In this lesson, students will determine the criteria that are sufficient for determining triangle similarity.

 
Favorites (2)
 
Resources (15)
 
Reflections (1)
similar triangles
   

End of Year Assessment Review Day 3 of 4

Geometry » Unit: Final Assessment
Geometry » Unit: Final Assessment
Marisa Laks
New York, NY
Environment: Urban
 
Big Idea:

In this lesson, students practice problems involving concepts from the units on similarity, trigonometry and coordinate geometry.

 
Resources (11)
 
Reflections (1)
assessment review image
   

Similarity Group Assessment

Geometry » Unit: Triangle Similarity and Trigonometric Ratios
Geometry » Unit: Triangle Similarity and Trigonometric Ratios
Jessica Uy
Sunnyvale, CA
Environment: Suburban
 
Big Idea:

Students will be able to apply their understanding of triangle similarity in novel ways to write proofs and demonstrate their understanding on a group assessment.

 
Resources (12)
 
Reflections (1)
midsegment proof picture
Common Core Math
 
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