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Two-dimensional shapes

Mathematics

Two-dimensional shapes

An AR classroom game for Grade 3. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 4 rounds in an interactive matching activity.

Curriculum indicatorค 2.2 ป.2/1

PlayHost a classroom

A look before you play

Sample questions

A few real prompts from the game to help you choose an activity for your class.

  1. Match each shape to what makes it that shape.

    • square
    • rectangle
    • equilateral triangle
    • circle
    Read the explanation

    What distinguishes each kind of quadrilateral.

  2. Match each solid to its number of faces.

    • cube
    • sphere
    • square-based pyramid
    • cylinder
    Read the explanation

    Count the faces of each solid.

  3. Match each kind of line to its name.

    • two straight lines meeting at a right angle
    • two straight lines that never meet
    • the line round a circle
    • the line from the centre to the edge
    Read the explanation

    The kinds of line used in geometry.

Before you play

Game teaching guide

What children will practise

Describe 2D shapes (all sides equal, opposite sides equal), revisiting indicator ค 2.2 ป.2/1, count the faces of 3D solids, know the names perpendicular, parallel and radius, and review the 6 to 9 tables.

What's in the worksheet

4 matching questions - Rectangle with opposite sides equal; circle with every point the same distance from the centre - Cube 6 faces, square-based pyramid 5 faces, cylinder 2 flat faces - Two lines meeting at a right angle with perpendicular; centre to edge with radius - 6 × 8 = 48, 7 × 6 = 42, 9 × 8 = 72

How to use it in class

Use as an extension after geometry lessons, 6-8 minutes, team mode, with shape models and a pair of compasses or a bottle lid to show. - The lines question uses words not yet in the P3 curriculum (radius, circumference, perpendicular); draw each on the board before playing - For faces, let teams handle a real pyramid: 1 base face and 4 side faces - Play it linked to the class to record results in the mark book

Common sticking points

- In Q1, a square also has opposite sides equal and an equilateral triangle also has all sides equal, so pupils may swap them. Teach them to pick the most specific description for each shape - Counting 4 faces on the square-based pyramid by forgetting the base - Mixing up circumference and radius, both new words. Draw a circle and point to each

Play together first, then build on it with a worksheet for the same level.

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Two-dimensional shapes — AR game for Grade 3 | Krufahda