Overview
Practice
Watch
Read
Next Steps
Overview
8th Grade Math
Expressions, Equations, and Relationships
26. TX.8.8.B
26.4 Rectangular shape related questions in linear equations
Rectangle Word Problems
Set up rectangle word problems by naming the width, expressing the length in terms of it, and solving the perimeter equation.
What You'll Learn
Name the width as the unknown, usually w.
Express the length algebraically in terms of w.
Use the perimeter formula P = 2(width + length).
Solve the resulting linear equation for w, then find the length.
Area word problems use the same naming but give a quadratic equation instead.
What You'll Practice
1
Setting up perimeter equations from rectangular word problems
2
Solving for dimensions using substitution with height-width relationships
3
Working with decimal values in geometric measurement problems
Why This Matters
Understanding how to model rectangular shapes with linear equations is essential for real-world applications like construction, design, and space planning. This skill bridges geometry and algebra, preparing you for advanced problem-solving in physics, engineering, and everyday projects.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Linear Equations
Perimeter
Substitution Method
Word Problems
Rectangular Geometry
Systems of Equations
Algebraic Modeling
TX Curriculum Aligned