Making triangles
http://illuminations.nctm.org/LessonDetail.aspx?ID=L159
A lesson plan for grade K Mathematics
In this lesson, one of a four-part unit from Illuminations titled “Ladybug Adventures — Learning Geometry and Measurement Concepts,” students use 45- and 90-degree angles to create triangles and develop an understanding of the relationship between angles and the shape of a triangle. Students use their knowledge of numbers, measurement, and geometry to design a “virtual path” using two different angles to help a ladybug reach its hiding place under a leaf.
North Carolina Curriculum Alignment
Mathematics (2004)
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.
