Please help The students in Mr. Nottingham’s class are writing expressions for
the perimeter of a rectangle that has a side length of l and a
width of w. They share their answers:
Sergio: 2(l + w)
Jamie: l + w + l + w
Karina: 2l + w
Ethan: 2w + 2l
l
w
l
Finish each sentence by explaining how each student was thinking
about finding the rectangle’s perimeter:
 Sergio’s strategy was to…
 Jamie’s strategy was to…
 Karina’s strategy was to…
 Ethan’s strategy was to…
Which of the students are correct? If a student was incorrect,
explain what they did wrong.