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Grade 2 · Math · Unit 17 of 18

Shapes & Symmetry

Sides, symmetry and congruent shapes

What your child practises

Counting sides and right angles, finding lines of symmetry, putting shapes together and apart, and knowing when two shapes match exactly.

Nunavut Curriculum approved guide: Nunavut Mathematics K–6 (2025), 2.SS.3.3 · lines of symmetry

How we explain it

Children can open this short lesson before they practise.

  1. Count the sides and corners to name a shape.
  2. A line of symmetry cuts a shape into two matching halves.
  3. Fold it: if the halves match, the line works.

Example: How many sides does a pentagon have? Penta- means 5. A pentagon has 5 sides. Answer: 5

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 lines of symmetry does this shape have?

    • 1
    • 5
    • 2

  2. Question 2

    How many square corners (right angles) does a square have?

    • 1
    • 4
    • 2

  3. Question 3

    You cut a rectangle into two pieces and slide them into a new shape. Does the area change?

    ✂️
    • yes, it gets bigger
    • no, it stays the same

  4. Question 4

    You trace a rectangle and cut out the tracing. Is the tracing congruent to the rectangle?

    ✂️
    • yes
    • no

  5. Question 5

    What is this shape called?

    • parallelogram
    • hexagon
    • rectangle
    • rhombus

  6. Question 6

    How many sides does this shape have?

    • 4
    • 8
    • 5

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