3.MATH.7.B
Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems.
Grade 3 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
perimeterpolygonlengthside lengthproblems
Skills
- determine (the perimeter of a polygon) #dok2
- determine (a missing side length given the perimeter and other side lengths of a polygon) #dok2
- apply (addition and subtraction to solve perimeter and missing length problems) #dok2
- solve (problems involving perimeter and missing side lengths) #dok2
Learning Targets
- I can determine the perimeter of a polygon by adding the lengths of its sides. #dok2
- I can find a missing side length when I know the perimeter and other side lengths. #dok2
- I can apply addition and subtraction to solve problems about perimeter. #dok2
Big Ideas
- Perimeter is the total length around a two-dimensional shape, and knowing how to find it helps solve real-world measurement problems.
- Understanding how to find unknown side lengths when given the total perimeter helps develop reasoning and problem-solving skills.
Essential Questions
- What does it mean to find the perimeter of a polygon?
- How can you use the perimeter to find a missing side length of a figure?
- In what real-life situations might you need to find the perimeter or a missing side length?
- What strategies can help you organize your work when solving perimeter problems?
- Why is it important to understand the relationship between a shape’s sides and its perimeter?