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3rd grade · Math · Unit 11 of 16

Sorting Polygons

Triangles, quadrilaterals, pentagons, hexagons and octagons, regular and irregular.

What your child practices

Practices naming polygons by their number of sides and sorting them as regular (all sides and angles equal) or irregular.

New York State Learning Standards learning standard: NY-3.G.1 · naming and sorting polygons by their number of sides and vertices

How we explain it

Children can open this short lesson before they practice.

  1. A polygon is a closed shape with straight sides.
  2. Triangle 3 sides, quadrilateral 4, pentagon 5, hexagon 6, octagon 8.
  3. A polygon has as many corners as sides.

Example: How many sides does a hexagon have? Hexa- means 6. A hexagon has 6 sides. Answer: 6

Sorting Polygons in New York

In the New York State Learning Standards, this is unit 11 of 16 in 3rd grade Math, after Area & Perimeter and before Times Tens.

Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.

Source: New York State Education Department (NYSED)

Sample questions

A taste of this unit. In the app, questions change every time and get easier or harder to match your child.

  1. Question 1

    How many sides does a quadrilateral have?

    • 4
    • 3
    • 5

  2. Question 2

    A rhombus has four…

    • right angles only
    • equal sides
    • curved sides

  3. Question 3

    Which shape is NOT a polygon?

    • A pentagon
    • A circle
    • A triangle

  4. Question 4

    How many corners does a hexagon have?

    • 6
    • 8
    • 5

  5. Question 5

    Which has 6 equal sides?

    • A square
    • A regular pentagon
    • A regular hexagon

  6. Question 6

    A shape has 7 sides. It is a…

    • octagon
    • hexagon
    • heptagon

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