Geometric Expressions

Student Work

Work Time

Student Work

The image shows four expressions that Sophie, Jack, Kevin, and Marcus wrote for the perimeter of the rectangle that is 100 tiles long.

  • Which three expressions are correct?
  • Are the three correct expressions equivalent? Explain.
  • What is an expression for the perimeter that has only one term?


  • Are any of the four expressions equivalent to the expression you wrote?
  • Think about how you might use properties of operations (associative, commutative, and distributive) to identify equivalent expressions.
  • Look for an expression with only one term. Can you write it in a simpler way?