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Angles and triangles

Mathematics

Angles and triangles

An AR classroom game for Grade 5. 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.5/1

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. How many degrees is a right angle?

    • 90
    • 180
    • 45
    Read the explanation

    A right angle is ninety degrees - the corner of a sheet of paper.

  2. How many degrees is a straight angle?

    • 90
    • 180
    • 360
    Read the explanation

    A straight angle is a straight line - one hundred and eighty degrees.

  3. What do the angles of a triangle add up to?

    • 360
    • 90
    • 180
    Read the explanation

    The three angles of a triangle always total one hundred and eighty degrees.

Before you play

Game teaching guide

What children will practise

Revise the sizes of basic angles (a right angle is 90 degrees, a straight angle 180) and use the facts that a triangle's angles total 180 and a quadrilateral's 360 to find a missing angle.

What's in the worksheet

6 questions, multiple choice with 3 options - How many degrees in a right angle (90) and in a straight angle (180) - A triangle has angles of 60 and 70 degrees; find the third (50) - What the angles of a quadrilateral add up to (360) - Each angle of an equilateral triangle (60)

How to use it in class

Use at the start of a lesson as a warm-up before triangles and quadrilaterals; about 5-7 minutes. - Play in team mode on the projector and give each team scrap paper to write 180 minus the known angles - If many miss Q5, draw a diagonal across a quadrilateral on the board to make two triangles and ask what two lots of 180 make - For Q4, have children say their working aloud, not just the number - Play it linked to the class to record results in the mark book.

Common sticking points

- Q4: children may pick 60 because it appears in the question, or 40 after a subtraction slip; write 180 - 60 - 70 step by step - Q5: children who only remember 180 for triangles often give 180 for a quadrilateral too; split it into two triangles - Q1 and Q2: right and straight angles get swapped; compare a paper corner (90) with a ruler laid flat (180)

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

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