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- Grade Range
- 9th - 12th
- Rating
Students practice writing formal two column geometric proofs involving congruent triangles and congruent corresponding parts. Full Review »
- Grade Range
- 7th - 12th
- Rating
Students demonstrate understanding by identifying and giving examples of undefined terms, axioms, theorems, and inductive and deductive reasoning. They also write geometric proofs, including proofs by contradiction. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students participate in a math unit to focus on the following: further develop the idea of a proof. They also develop the process of formalizing the idea of a proof and how it is related to an understanding of defining truth. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students create graphic organizers to visually represent geometric concepts. Working in small groups, students develop five graphic organizers that fit a particular proof. Diagrams are presented to the class. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students explore different classifications of triangles. Students define geometric terms associated with triangles. Following a step-by-step process, introduced and completed in class, they solve a proof. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students review the postulates of algebra that have a significant relationship to geometry. Students complete proofs through the use of geometric properties and principles. This lesson is a continuation of a previous lesson on proofs. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students initiate the process of creating ten images based on specific criteria for a geometry portfolio project. Working in groups, students brainstorm various ways to create and edit their images using an image editing program. A mock up of their work is completed for approval. Full Review »
- Grade Range
- 10th - 12th
- Rating
Students are introduced to the concept that proofs are related to the construction of parallel lines. As a whole class, if-then statements are reviewed. Students create an inf-then proof for parallel lines. Full Review »
- Grade Range
- 9th - 11th
- Rating
Students analyze optical illusions using coordinate geometry and will prove regularity, congruence, or similarity of the shapes in the optical illusion. They research various optical illusions that use geometric shapes and choose one of the optical illusions researched. Coordinate geometry is used to prove that the figures are congruent, similar, or regular depending on the chosen illusion. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students engage in a lesson that is about the classification of triangles and the mathematical proofs involved in working with them. They work on a variety of problems that are created by the teacher with the focus upon the importance of classifying the triangles. Full Review »
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