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Grade 3
. What Is It? Tips and Tricks Current Page:When Students Ask Lesson Ideas
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When Students Ask

Identifying and Classifying Polygons

  • Why should I bother learning this?
  • This is an excellent opportunity to ask your students to look around the classroom or school for examples of polygons. Having students go on a polygon scavenger hunt will help. Encourage students to discuss the importance of having different polygons. Could we survive with only squares?

  • Is a square the same as a rectangle?
  • Many students interchange the terms square and rectangle. It is extremely helpful to list the properties of a square and rectangle side by side on a board for the class to see. Help students see that all squares are rectangles, but not all rectangles are squares.

Rectangle

Quadrilateral

4 right angles

Opposite sides are parallel

Opposite sides are congruent
Square

Quadrilateral

4 right angles

Opposite sides are parallel

All sides are congruent
  • Isn't a four-sided polygon called a rectangle?
  • Students will probably not know the term quadrilateral when they start this level. Explain that the prefix quad- means four. It is also important to reassure students who ask this question that a rectangle is a specific kind of quadrilateral. Show students many different quadrilaterals that are not rectangles or squares.

 

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