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Unknown Type
Khan Academy

Khan Academy: Use Similar & Congruent Triangles

For Students 9th - 10th Standards
Solve geometry problems with various polygons by using all you know about similarity and congruence.
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Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Congruent Triangles

For Students 9th - 10th Standards
Find a quick, concise explanation of Congruent Triangles. Several examples are given and clearly explained.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Congruent Triangles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students determine whether two triangles are congruent. Students examine guided notes, review guided practice, watch instructional videos and attempt...
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Unit Plan
Sophia Learning

Sophia: Using Corresponding Parts of Congruent Triangles

For Students 9th - 10th Standards
This lesson will demonstrate the use of CPCTC in triangle congruency proofs.
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Unit Plan
Texas Education Agency

Texas Gateway: Applying Triangle Congruence Relationships

For Students 9th - 10th Standards
Given congruent triangles, the student will justify and apply triangle congruence relationships.
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Activity
Analyze Math

Analyze Math: Congruent Triangle Problems

For Students 9th - 10th Standards
The geometry tutorial investigates congruent triangles. The activity has several examples with detailed solutions.
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Activity
Oswego City School District

Regents Exam Prep Center: Organizing and Venn Diagrams With Congruent Triangles

For Teachers 9th - 10th
As a resource for teachers, an activity of how to connect Venn Diagrams with the five methods of proving triangles congruent - SSS, SAS, ASA, AAS, HL - is explained.
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Handout
CK-12 Foundation

Ck 12: Geometry: Triangle Congruence Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Provides an overview of triangle congruence, including key terms, properties of congruent triangles, triangle postulates and theorems, and special triangles.
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Lesson Plan
Other

Nearpod: Triangle Congruence

For Teachers 9th - 10th Standards
In this activity, students will prove triangles are congruent using the triangle congruence theorems.
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Handout
Sonoma State University

Sonoma State University: Parallel Lines and Similar and Congruent Triangles

For Students 9th - 10th Standards
This site defines parallel lines, parallel lines cut by a transverse, and congruent triangles. It also contains links for related terms.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Showing a Triangle Congruence: The General Case

For Teachers 9th - 10th Standards
Given distinct, congruent triangles, students are asked to show that congruence can always be shown with one, two, or three rigid motions. Aligns with G-CO.A.5.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Showing a Triangle Congruence: A Particular Case

For Teachers 9th - 10th Standards
Given two congruent triangles, students are asked to analyze the effects of different transformations. Aligns with G-CO.A.5.
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Lesson Plan
Texas Instruments

Texas Instruments: Sas Triangle Congruence

For Teachers 9th - 10th Standards
This activity will help learners visualize the construction of congruent triangles and conceptualize properties through measurement and movement of their construction. Students will need access to the TI-84 Plus Family.
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Interactive
Math Open Reference

Math Open Reference: Congruence

For Students 9th - 10th Standards
A complete reference guide to congruence including congruent triangles and polygons. It provides definitions, animation, and interactive activities that enhance further explanation.
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Whiteboard
ClassFlow

Class Flow: Congruent Triangles, Bi Conditional Statements

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This flipchart contains an introduction to congruent triangles. It also introduces logic (p->q) including bi-conditional statements. A challenge is presented to students.
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Interactive
Government of Alberta

Learn Alberta: Math Interactives: Exploring Similarity and Congruence

For Students 6th - 8th
This multimedia Learn Alberta math resource looks at how the math concepts of similarity and congruence are utilized in the making of road signs. The accompanying interactive component asks students to manipulate triangles by dragging,...
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Interactive
Government of Alberta

Learn Alberta: Exploring Similarity and Congruence

For Students 6th - 8th Standards
Begin by watching this captivating video showing how the concepts of similarity and congruence are found in road signs. Following the video [1:27], an interactive applet allows students to resize, flip, move and rotate triangles to...
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Lesson Plan
Oswego City School District

Regents Exam Prep Center: Congruence of Triangles

For Teachers 6th - 8th Standards
Congruent means, "same size, same shape." Find out more about this concept at this test prep site with real world examples and pictures. Hands-on classroom activity and lots of practice. Knowledge of basic algebra and geometry concepts...
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Activity
Free Math Help

Free Math Help: Congruent Triangles

For Students 9th - 10th Standards
Students learn about congruent triangles. The tutorial consists of definitions and sample exercises with solutions.
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Interactive
Mangahigh

Mangahigh: Shape: Congruent Triangles

For Students 9th - 10th Standards
Explain how two triangles are congruent.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.g Congruent Triangles

For Teachers 8th Standards
In this task, 8th graders investigate congruence and transformations of two triangles on a coordinate grid. Includes a GeoGebra worksheet that the teacher can use for demonstration purposes. Aligns with 8.G.A.2.
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Handout
Sonoma State University

Sonoma State University: Parallel Lines and Similar and Congruent Triangles

For Students 9th - 10th Standards
This site defines eleven theorems relating to parallel lines and similar and congruent triangles. Links to the theorems and relevant term descriptions are provided.
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Unit Plan
Cuemath

Cuemath: Median of a Triangle

For Students 9th - 10th Standards
This lesson explores the equation of the median of a triangle formula, sum of medians of a triangle, altitude of a triangle, median of equilateral triangle formula, and median of a triangle definition while discovering the interesting...
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Unit Plan
Cuemath

Cuemath: Triangles

For Students 5th - 8th Standards
Explore everything about triangles. Learn about the different types, important properties, and how to find its area and perimeter. Check out the solved examples and interactive questions for better understanding.

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