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maths fun
Experiential Learning
Angles using one’s own body

• Stand straight. This is a straight angle (180°).
• Make an ‘L’ shape with your arms. This is a right angle (90°).
• Make a ‘V’ shape with your arms. This is an acute angle (less than 90°).

• Stretch your arms wider than an ‘L’. This is an obtuse angle (more than 90°).

Fast Check
Go on a treasure hunt in your classroom or at home. Find and list two examples
each of acute, obtuse, and right angles you see in everyday objects.

turn the anGle

A turn involves rotating an object in any direction around a fixed point. Turns are closely

related to angles, as each turn corresponds to a specific angle measure. There are 360
degrees in a complete turn. Let’s see how half, quarter, three quarter and full turns are
represented.

3 1 1
1 turn is 360° turn is 270° turn is 180° turn is 90°
4 2 4

Have you ever made a paper fan? It looks like . Now let’s turn the paper fan to

see how turning it makes different angles.

1
1
1
1 turn 1 turn Less than a turn Between a and turn
Full turn 2 4 4 4 2
(straight angle) (right angle) (acute angle) (obtuse angle)

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