Looking for a different approach to triangle congruence criteria? Employ transformations to determine congruent triangles. Learners list the transformations required to map one triangle to the next. They learn to identify congruence...

How do you know if a pair of triangles are congruent? Use the lesson plan to help class members become comfortable identifying the congruence criteria. They begin with an exploration of ASA and SSS criteria through transformations and...

Playing with mathematics can invoke curiosity and excitement. As pupils construct triangles with given criteria, they determine the necessary requirements to support similarity. After determining the criteria, they practice...

Your geometry learners are guided by questions that help them use the language of reflections to explain the Side-Angle-Side congruence between two triangles in this collaborative task. Given a sample solution, declaring the...

Students explore the concept of congruent triangles.  In this congruent triangles activity, students use Cabri Jr. to construct two congruent triangles using circles.  Students determine if the two triangles are congruent by...

Build confidence in proofs by proving a known property. Pupils explore two approaches to proving base angles of isosceles triangles are congruent: transformations and SAS. They then apply their understanding of the proof to more complex...

In this congruent triangles worksheet, high schoolers solve four multiple choice problems. Students determine which statement is the appropriate reasoning to say that two triangles are congruent.

Students identify and use the similarity theorem. In this geometry lesson, students differentiate between congruent and similar triangles. They solve problems using the computer modifying shapes by dragging.

Tenth graders explore congruent triangles.  In this geometry lesson plan, 10th graders investigate the conditions necessary to prove two triangles are congruent by SSS, ASA, AAS, or SAS. 

Students explore the concept of similarity and congruence. In this similarity and congruence lesson, students identify and verify whether or not two figures are similar, congruent, or neither. Students use postulates and theorems such as...

Students explore the concept of similarity and congruence. In this similarity and congruence lesson plan, students cut out strips of paper and form a triangle. Students try to prove that their triangles are congruent using the SSS...

Not a lesson in the traditional sense, this is a collection of resources with which you can craft a lesson on metabolic processes. It includes an outline of topics, some brief discussion, and a large array of animations, images, and...

Learners explore global issues through visual art analysis. In this African art lesson, students examine works by El Anatsui and discussing their human rights themes. Learners then design lesson plans based on their findings.

Students examine how differences in culture affect people. In this cultural conflict lesson, students use the Internet to research specific incidents in history where conflict led to violence, then the class discuss possible solutions...

Students research the art of selected cultures. In this visual arts lesson, students compose essays after they conduct independent research on the art of a culture. Students also create art proposals that feature the attributes of the...

Students address stereotypes. In this cultural diversity lesson, students define stereotypes, share examples of prejudice, research current event issues in given nations, and create posters that feature unbiased news stories.  

Is the amount of information getting overwhelming for your geometry classes? Use this strategy as a way to organize information. The resource provides a handout of information studied in relation to triangle congruence. It includes a...

Your geometry learners explore Angle-Side-Angle congruence in this collaborative task. The sum of the interior angles of all triangles being one hundred eighty degrees, is the key learners will discover as they explain their reasoning...

Your learners will make good use of the Socratic method in a collaborative task that begins with an assumed solution and ends with deeper understanding of the idea of determining two triangles congruent.

While it may seem incredibly obvious to the geometry student that congruent sides make congruent triangles, the proving of this by definition actually takes a bit of work. This exercise steps the class through this kind of proof by...

Proving triangles are similar is often an exercise in applying one of the many theorems young geometers memorize, like the AA similarity criteria. But proving that the criteria themselves are valid from basic principles is a great...

Combine transformations and triangle congruence in a single lesson. Scholars learn to view congruent triangles as a rigid transformation. Using triangle congruence criteria, learners identify congruent triangles and the rigid...

Discuss how political postcards affected everyday people's thoughts and beliefs. Pupils continue a unit on the Dreyfus Affair as they engage in class discussion, watch a video, view a PowerPoint presentation, and fill out worksheets to...

Historical events do not occur in a vacuum. Such is the case of the Dreyfus Affair, where the connection between Captain Alfred Dreyfus, Emile Zola, and Hannah Arendt is fused by the events of the early 20th century. The informative...