Reflection: Rigor Parallelogram Definition and Properties - Section 1: Concept Development


A lesson on the definition and properties of parallelograms could be perceived as lacking rigor. I tried to add rigor to this lesson by focusing on the mathematical practice of classification, one of the most important practices in geometry. This concept of class also has leverage in subjects such as biology, chemistry, and computer science. 


Another way I tried to add rigor was by focusing on the difference between definitions and properties. This is also an important distinction that has leverage in multiple contexts. It's also a distinction that many students miss. In geometry, it is important to understand what does and does not constitute a definition. This is knowledge that will be valuable to students well beyond this particular lesson.


So while this lesson does not have a whole lot of complexity, it does have some important and foundational concepts that can played up to give it some rigor and complexity.

  Adding rigor by focusing on practices and broader themes
  Rigor: Adding rigor by focusing on practices and broader themes
Loading resource...

Parallelogram Definition and Properties

Unit 5: Quadrilaterals
Lesson 1 of 8

Objective: SWBAT define parallelogram and apply the four properties of parallelograms

Big Idea: Members Only...Exploring what makes a parallelogram a parallelogram.

  Print Lesson
19 teachers like this lesson
Math, Geometry, parallelogram, quadrilaterals, problem solving, reasoning and proof, Polygons, properties of quadrilaterals
  60 minutes
Similar Lessons
Shifty Shears
Geometry » Area Relationships
Big Idea: We use Cavalieri's Principle to analyze racing yacht sails, the face of a deck of cards, and shears...which are used in yet another transformation proof.
Ault, CO
Environment: Rural
Tom Chandler
Presenting Polygons
Geometry » Pretty Polygons
Big Idea: Tri, Quad, Pent, Hex ... learn the key vocabulary for polygon shapes and find interior angle measure for these pretty polygons!
Saratoga Springs, NY
Environment: Suburban
Stephanie Conklin
Introductory Investigation of Quadrilaterals
Geometry » Quadrilaterals
Big Idea: Students familiarize themselves with quadrilaterals by using a ruler and protractor to investigate the characteristics that define each polygon.
Amsterdam, NY
Environment: Urban
Beth Menzie
Something went wrong. See details for more info
Nothing to upload