HSG-SRT.B.5

Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

 
41 Lesson(s)
   

Special Right Triangles Puzzle Activity

Geometry » Unit: Similar and Right Triangles
Geometry » Unit: Similar and Right Triangles
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

Putting together puzzles is an engaging way for students to review their knowledge of special right triangles.

 
Favorites (55)
 
Resources (11)
puzzleactivityimage cropped
   

Similar Figures Activity

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

Students move about the room, seeking their partner in similarity and calculating missing values.

 
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Resources (13)
image sim fig cards
   

The Rope Stretcher

Geometry » Unit: Area Relationships
Geometry » Unit: Area Relationships
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Students apply the Pythagorean Theorem and criteria for triangle congruence in a proof...and learn how the ancient pyramids of Egypt were laid out.

 
Favorites (10)
 
Resources (26)
theropestretcher image
   

Create Your Own Similar Figures

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

Students create and investigate their own concave similar polygons.

 
Favorites (8)
 
Resources (15)
examples of final
   

Error Analysis: Finding Sides of Similar Triangles

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

Student examine common errors made in setting up and solving for missing sides of similar triangles.

 
Favorites (9)
 
Resources (10)
image error analysis
   

CPCTC

Geometry » Unit: Proofs about Triangles
Geometry » Unit: Proofs about Triangles
Marisa Laks
New York, NY
Environment: Urban
 
Big Idea:

Students will use their knowledge of the ASA, SAS and SSS postulates to prove corresponding parts of congruent triangles are congruent.

 
Favorites (4)
 
Resources (14)
cpctc image
   

Dilation and Similarity Unit Test

Geometry » Unit: Scaling Up- Dilations, Similarity and Proportional Relationships
Geometry » Unit: Scaling Up- Dilations, Similarity and Proportional Relationships
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Students will show what they know!

Standards:
HSG-SRT.A HSG-SRT.B.5
 
Favorites (2)
 
Resources (20)
quote jefferson
   

Building a Kicker Ramp

Geometry » Unit: Introduction to Trigonometry
Geometry » Unit: Introduction to Trigonometry
Tom Chandler
Ault, CO
Environment: Rural
 
Big Idea:

Students are introduced to trigonometry as they use the properties of similar right triangles to evaluate a design for a skateboard ramp.

 
Favorites (19)
 
Resources (26)
kicker ramp 06
   

Introduction to Similar Right Triangles

Geometry » Unit: Similar and Right Triangles
Geometry » Unit: Similar and Right Triangles
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

Students investigate the three similar right triangles created by the altitude to the hypotenuse of a right triangle.

 
Favorites (7)
 
Resources (19)
 
Reflections (1)
image sim right triangles intro
   

Finding Missing Sides of Similar Triangles

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

Students will use the criteria for similarity to find the measures of missing sides of a triangle.

 
Favorites (4)
 
Resources (17)
finding missing sides using similar triangles resized image
   

AAS and ASA Fun

Geometry » Unit: Tremendous Triangles
Geometry » Unit: Tremendous Triangles
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

Students will work with a partner to discover two more theorems as they explore why ASA and AAS congruence proves triangles are congruent.

 
Favorites (4)
 
Resources (22)
 
Reflections (2)
triangle construction aas and asa fun image
   

Working with Similar Triangles

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

Similar or not similar? That is the question!

 
Favorites (6)
 
Resources (9)
working with similar triangles
   

Using the Pythagorean Theorem

Geometry » Unit: Similar and Right Triangles
Geometry » Unit: Similar and Right Triangles
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

Students practice finding lengths of segments using the Pythagorean Theorem, with an eye toward discovering common Pythagorean triplets.

 
Favorites (5)
 
Resources (10)
pythagoreanimage resized
   

SAS-sy Triangles

Geometry » Unit: Tremendous Triangles
Geometry » Unit: Tremendous Triangles
Stephanie Conklin
Saratoga Springs, NY
Environment: Suburban
 
Big Idea:

In this student-centered lesson, students will explore and explain why the SAS congruence theorem works to prove triangles congruent.

 
Favorites (4)
 
Resources (35)
 
Reflections (5)
mark picture image sassy triangles
   

30, 60, 90 Triangles

Geometry » Unit: Similar and Right Triangles
Geometry » Unit: Similar and Right Triangles
Beth Menzie
Amsterdam, NY
Environment: Urban
 
Big Idea:

Students discover the patterns involved in a 30-60-90 triangle.

 
Favorites (2)
 
Resources (12)
30 60 90image resized
Common Core Math
 
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