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- Grade Range
- 2nd - 4th
- Rating
Students create and classify different types of triangles using an online geo-board. They explore the concepts of similar and congruent as they discover how to draw similar and congruent triangles. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students define and discuss congruency and the corresponding parts between congruent triangles. They create a pair of congruent triangles, test for congruency, and complete a worksheet. Full Review »
- Grade Range
- 6th - 8th
- Rating
Students draw similar and congruent shapes, identify shapes on cards, then share their shape with the class. Full Review »
- Grade Range
- 5th - 7th
- Rating
Students explore congruent triangles. Using sticks, they construct a triangle, define key vocabulary terms, and write three ways to prove that a triangle is congruent. Full Review »
- Grade Range
- 9th - 12th
- Rating
Students explain the four basic ways to prove two triangles congruent. They analyze how congruent triangles may be used in the "real world". Students use deductive proof writing to prove two triangles are congruent. Full Review »
- Grade Range
- 7th
- Rating
Students determine whether two triangles are congruent and provide an explanation to why they are not. They apply concepts of measurement of angles and collect evidence of congruent angles in the world. Full Review »
- Grade Range
- 3rd - 5th
- Rating
Students explore congruent shapes and figures. They listen to the book, "Book of Shapes" by Margery W. Brown, sort shapes by the number of sides, form various congruent shapes using their bodies, form and glue congruent shapes out of craft sticks onto construction paper, and explore various math websites. Full Review »
- Grade Range
- 5th
- Rating
Students examine what a quadrilateral is by looking at a variety of shapes before writing the definition in their ABC Books of Geometry. Next they examine images of shapes to decide if they are similar, congruent, or neither, before adding examples to their books. Finally, they look at symmetrical shapes before sharing their journals. Full Review »
- Grade Range
- 6th
- Rating
Students identify and compare various triangles and quadrilaterals according to their sides and angles. They identify and model geometric figures that are congruent, similar, and symmetrical. Students recognize symmetry and they find the lines of symmetry. Full Review »
- Grade Range
- 9th
- Rating
Students investigate the concept of a tetrahedron and how it is formed with its congruent faces. They practice making the shape by practicing the folding paper to create the shape. Students continue the lesson with the estimation for how a shape can cover so much space. Full Review »
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