4.MATH.5.C
Use models to determine the formulas for the perimeter of a rectangle (l + w + l + w or 2l + 2w), including the special form for perimeter of a square (4s) and the area of a rectangle (l x w).
Grade 4 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
modelsformulasperimeterrectanglelengthwidthsquarearea
Skills
- use models (to determine formulas for perimeter and area) #dok2
- determine formulas (for the perimeter of a rectangle and a square) #dok2
- determine formulas (for the area of a rectangle) #dok2
- apply formulas (to real-world and mathematical problems) #dok3
Learning Targets
- I can use models to find the formula for the perimeter of a rectangle. #dok2
- I can use models to find the formula for the area of a rectangle. #dok2
- I can explain why the formula for the perimeter of a square is 4s. #dok2
- I can recognize and apply the formulas for perimeter and area to solve problems. #dok3
Big Ideas
- Understanding models helps uncover why the formulas for perimeter and area of rectangles and squares work.
- The properties of rectangles and squares connect to general rules for calculating perimeter and area.
Essential Questions
- How do models help you figure out the formula for the perimeter or area of a rectangle?
- Why does the perimeter of a square have a different formula than a rectangle?
- In what real-life situations do you need to know how to calculate perimeter or area?
- How can you prove the formulas for perimeter and area using concrete models?
- What is the relationship between length, width, and area in rectangles?