Mathematics

Angles and lines

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 6 questions in an interactive multiple choice activity.

Curriculum indicatorค 2.2 ป.4/1

Play Host 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.

01
What kind of angle is the corner of a sheet of paper?
- right angle
- obtuse angle
- acute angle
Read the explanation
The corner of a sheet of paper is a right angle - ninety degrees.
02
What is an angle smaller than a right angle called?
- straight angle
- acute angle
- obtuse angle
Read the explanation
An acute angle is smaller than ninety degrees.
03
What is an angle larger than a right angle but less than a straight line called?
- right angle
- acute angle
- obtuse angle
Read the explanation
An obtuse angle lies between ninety and one hundred and eighty degrees.

Before you play

Game teaching guide

What children will practise

Recognise kinds of angle by comparing with a right angle (acute, right, obtuse) and know parallel lines, using everyday things such as a paper corner and clock hands, as groundwork for classifying angles in P4 (indicator ค 2.2 ป.4/1).

What's in the worksheet

6 multiple-choice questions - The corner of a sheet of paper is a right angle - An angle smaller than a right angle is acute - An angle bigger than a right angle but less than a straight line is obtuse - A square has 4 right angles - Lines that never meet are parallel, and the clock hands at 3 o'clock make a right angle

How to use it in class

Use as an enrichment activity once pupils have met right angles through rectangles, about 6 minutes, team mode. Give every team paper to fold into a right-angle tester. - For the clock question, set a teaching clock to 3 o'clock and hold the paper corner against it - Afterwards, hunt for parallel lines in the room, such as board edges and window rails - The on-screen explanations mention 90 and 180 degrees, which P3 pupils have not met; compare with the paper corner instead of using degrees - Play it linked to the class to record results in the mark book

Common sticking points

- Swapping the names acute and obtuse. Link "acute" (แหลม) to a sharp pencil tip - Picking perpendicular for lines that never meet, having heard both words without the meanings. Draw both on the board - Picking straight angle for 3 o'clock, thinking of 6 o'clock