2.MATH.8.E
Decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts.
Grade 2 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
two-dimensional shapessquarerectangleshapehalfpartitionidentical trianglesgeometric parts
Skills
- decompose (two-dimensional shapes such as squares and rectangles) #dok2
- cut out (specific shapes from larger shapes) #dok2
- divide (a shape into halves or identical parts) #dok2
- partition (a rectangle into identical triangles) #dok2
- identify (resulting geometric parts after decomposition) #dok1
Learning Targets
- I can identify the geometric parts that result when a shape is decomposed. #dok1
- I can describe what happens to a shape after it is cut or partitioned. #dok1
- I can decompose two-dimensional shapes by cutting or partitioning them in different ways. #dok2
- I can divide a rectangle into identical triangles using partitioning. #dok2
- I can explain how and why shapes can be broken into smaller parts or different shapes. #dok3
Big Ideas
- Two-dimensional shapes can be broken into smaller parts in different ways.
- Decomposing shapes helps us understand their structure and how new shapes are formed.
Essential Questions
- What are different ways you can break a shape into smaller parts?
- How does cutting or partitioning a shape change the shapes you see?
- Why might it be useful to break a shape into smaller pieces?
- What do you notice about the parts that result when you decompose a rectangle?
- How can dividing shapes help you solve real-world problems or puzzles?