Grade 6 · Mathematics
Classifying quadrilaterals by their properties in Grade 6
Your child classifies four-sided shapes using side, angle, diagonal, symmetry, and parallel-line properties.
Where this sits in the year
One skill in the Grade 6 constellation
Topics to explore in Grade 6. This map does not indicate published lessons, completed assessments, or a complete course. Grade placement varies by curriculum.
How it's taught now
Students sort and construct shapes, noticing that one quadrilateral can belong to several nested categories.
Three mistakes to watch for
Thinking a rotated square is no longer a square.
Treating shape categories as mutually exclusive.
Judging by appearance instead of stated properties.
A worked example
A quadrilateral has four equal sides and four right angles. How many pairs of parallel sides does it have?
The shape is a square; each pair of opposite sides is parallel.
Answer: 2 pairs
Try this together
Can a square also be called a rectangle? Which properties support your answer?
Give them a moment to talk it through. The explanation matters more than a quick answer.