Making Virtual Triangles
http://illuminations.nctm.org/LessonDetail.aspx?ID=L84
A lesson plan for grades K–2 Mathematics
Learn more
Help
Please read our disclaimer for lesson plans.
Legal
This catalog record is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. This license applies to the content of this page only and does not apply to the referenced website.
This lesson, one of a five-part unit from Illuminations titled “Investigating Shapes: Recognizing, Constructing, and Identifying Triangles,” students identify and recognize triangles using multiple representations interactive electronic geoboards to explore the characteristics of triangles.
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 1
- Goal 3: Geometry - The learner will identify, describe, draw, and build basic geometric figures.
- Objective 3.01: Identify, build, draw and name parallelograms, squares, trapezoids, and hexagons.
- Objective 3.02: Identify, build, and name cylinders, cones, and rectangular prisms.
- Objective 3.03: Compare and contrast geometric figures.
- Objective 3.04: Solve problems involving spatial visualization.
Grade 2
- Goal 3: Geometry - The learner will perform simple transformations.
- Objective 3.01: Combine simple figures to create a given shape.
- Objective 3.02: Describe the change in attributes as two- and three-dimensional figures are cut and rearranged.
- Objective 3.03: Identify and make:
- Symmetric figures.
- Congruent figures.
Kindergarten
- Goal 3: Geometry - The learner will explore the concepts of geometry.
- Objective 3.01: Identify, build, draw, and name triangles, rectangles, and circles; identify, build, and name spheres and cubes.
- Objective 3.02: Compare geometric shapes (identify likenesses and differences).
- Objective 3.03: Model and use directional and positional vocabulary.
- Objective 3.04: Complete simple spatial visualization tasks and puzzles.
