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Area of polygons

Mathematics

Area of polygons

An AR classroom game for Grade 6. Learners can aim with their hands at the camera or play by tapping the screen.

This set has 6 questions in an interactive multiple choice activity.

Curriculum indicatorค 2.1 ป.6/1

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. A parallelogram with base 10 and height 6 - what is its area?

    • 60
    • 16
    • 30
    Read the explanation

    A parallelogram's area is base times height: ten times six is sixty.

  2. A trapezium with parallel sides 6 and 10 and height 4 - what is its area?

    • 40
    • 32
    • 64
    Read the explanation

    Add the parallel sides, multiply by the height, halve it: sixteen times four is sixty-four, halved is thirty-two.

  3. The area of a circle of radius 7, taking pi as 22/7?

    • 49
    • 44
    • 154
    Read the explanation

    Pi times the radius squared: 22/7 times forty-nine is one hundred and fifty-four.

Before you play

Game teaching guide

What children will practise

Find the area of parallelograms, trapeziums, triangles and circles (pi as 22/7), go from a square's area to its perimeter, and know that area is in square units, following ค 2.1 ป.6/2 and ป.6/3.

What's in the worksheet

6 questions, multiple choice with 3 options - Parallelogram, base 10, height 6 (60) - Trapezium with parallel sides 6 and 10, height 4 (32) - Circle of radius 7 with pi as 22/7 (154) - A square of area 100: its perimeter (40) - How units of area are written (square metre)

How to use it in class

Use as a formula review before polygon area problems; about 6-8 minutes. - Play in teams with all the formulas written in a corner of the board - If many miss Q2, join two paper trapeziums into a parallelogram to show where the halving comes from - Q5 has two steps, side then perimeter; have teams say both - Play it linked to the class to record results in the mark book.

Common sticking points

- Q1: halving the parallelogram as if it were a triangle gives 30 - Q2: forgetting to halve gives 64 - Q3: using 2 × radius instead of radius squared gives 44, the circumference - Q5: stopping at the side length of 10, or answering 100

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

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