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2nd grade · Math · Unit 5 of 18

Shapes

Sides, corners and faces

What your child practices

Describing shapes by their sides, corners (vertices) and faces, and spotting 3D shapes in real life.

New York State Learning Standards learning standard: NY-2.G.1 · naming polygons by their sides and telling polygons from shapes that are not polygons

How we explain it

Children can open this short lesson before they practice.

  1. 2D shapes are flat. 3D shapes take up space.
  2. Faces are the flat sides of a 3D shape.
  3. Edges are where faces meet. Vertices are corners.

Example: How many flat faces does a cube have? A cube is like a dice. It has a face on each side: 6. Answer: 6

Shapes in New York

In the New York State Learning Standards, this is unit 5 of 18 in 2nd grade Math, after Measuring and before Graphs.

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

    Which one is a hexagon?

    • triangle
    • circle
    • hexagon

  2. Question 2

    How many sides does this shape have?

    • 4
    • 7
    • 5

  3. Question 3

    A square has 4 sides that are all…

    🟦
    • the same length
    • curved
    • different lengths

  4. Question 4

    How many flat faces does a cube have?

    • 6
    • 4
    • 9

  5. Question 5

    Which 3D shape has no flat faces at all?

    • cylinder
    • sphere
    • cube

  6. Question 6

    Which 3D shape can roll AND stack?

    • cube
    • cylinder
    • sphere

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