Geometric Expressions

Match Approach and Expression

Work Time

Match Approach and Expression

Each student’s statement below describes a different way of thinking about how to express the perimeter of the rectangle that is 100 tiles long.

Read how these students approached the problem in order to write an expression.

Kevin: I added the lengths of the sides of the rectangle.

Jack: I added the length and width and then multiplied by 2.

Sophie: I saw that the first and last squares had 3 sides as part of the perimeter, but all of the other squares had only 2 sides in the perimeter.

  • Match each correct expression from the image with each of the three students’ statements.