Reflection: Rigor Perimeter, Area, and Combining Like Terms - Section 5: Closure and Ticket to Go


Many students were able to recognize that these figures had the same area, since they used the same blocks in a different formation.  There were a couple students who were able to figure out that the length of the one side was x - 1.  I had these students explain their reasoning to the class.  We combined like terms to create a perimeter expression and compared it with the perimeter expression for Figure A.  Students were able to see that the perimeter of Figure B is greater than the perimeter of Figure A.

  Rigor: Perimeter of Figure B
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Perimeter, Area, and Combining Like Terms

Unit 6: Expressions, Equations, & Inequalities
Lesson 14 of 20

Objective: SWBAT: • Define and identify algebraic expressions, algebraic equations, constants, and coefficients. • Calculate the perimeter and area of a rectangle and square • Write an expression to represent the perimeter and area of multiple shapes • Create equivalent expressions by combining like terms

Big Idea: What are similarities and differences between these figures? What expressions represent the perimeter and area of each figure? Students combine like terms and create expressions to represent the perimeter and area of figures created with algebra tiles.

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20 teachers like this lesson
Math, Algebra, Expressions (Algebra), combining like terms, algebra tiles, perimeter, 6th grade, area, master teacher project
  50 minutes
unit 6 14 image
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