Georgia 5.GSR.8.1
The Standard
Classify, compare, and contrast polygons based on properties.
Georgia's K-12 Mathematics Standards · Examine properties of polygons and rectangular prisms, classify polygons by their properties, and discover volume of right rectangular prisms.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students identify polygons by the number and properties of their sides and angles. They sort shapes into categories, compare categories, and explain when one polygon fits several groups.
What Mastery Looks Like
- Students sort shapes accurately, including placing one shape in more than one category. They compare two polygons using precise facts about side lengths, angles, and parallel or perpendicular sides.
Common Misconceptions
- Students often treat shape names as exclusive, so they say a square cannot also be a rectangle or rhombus. They may classify by appearance, orientation, or size instead of checking sides, angles, and parallel lines.
How to Assess It
- Give students a square, a rhombus, and a trapezoid. Ask them to list every category each shape belongs to and justify each choice with two properties.
Lesson moves
Ways to Teach It
Give pairs polygon cards and yarn hoops, then have them sort each shape into overlapping groups labeled by properties.
Have students respond to the claim that every square is a rectangle, using evidence about sides and angles.
Play Polygon Guess Who, where students ask yes-or-no questions about parallel sides, equal sides, and angles to identify a hidden shape.
Photograph polygon shapes around the school, then label each image with every category that fits and the properties that prove it.
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Printable 5.GSR.8.1 Worksheet
A ready-to-print activity worksheet aligned to 5.GSR.8.1, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- 3.GSR.6.2
Classify, compare, and contrast polygons, with a focus on quadrilaterals, based on properties. Analyze specific 3-dimensional figures to identify and describe q...
- 5.GSR.8
Examine properties of polygons and rectangular prisms, classify polygons by their properties, and discover volume of right rectangular prisms.
- 4.GSR.8.2
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- 3.GSR.6
Identify the attributes of polygons, including parallel segments, perpendicular segments, right angles, and symmetry.
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