Angles as Turns
Class 5 · Mathematics · 19 Questions
Give examples of real-life situations where you observe turns.
Reema takes two half turns in the same direction. It is like a ____turn.
What happens if she takes 2 quarter turns in the same direction? It is like a ____turn.
What happens if she takes 4 quarter turns in the same direction? It is like a ____turn.
Write some of the everyday objects that involve turns. For example, taps, ____, ____, ____, ____, and ____.
Do any of the above objects make a half turn? Write their names below.
Do any of the above objects make a full turn? Write their names below.
Make an acute turn with the straws or fan. Continue to make another acute turn. Can the two acute turns together make another acute turn?
Show a 1/8 turn of the straw.
Show a 2/8 turn. Show a 1/4 turn. Show a 3/8 turn.
What angle have you made with a 2/8 turn?
What angle have you made with a 4/8 turn?
Continue turning by 5/8, 6/8, 7/8, and 8/8. Check when you have completed a 3/4 turn and a full turn.
Can you guess what turn of the straw will be equal to half of a 1/6 turn? This is the same as a 1/12 turn.
Draw the angles formed by the following turns in your notebook: 1/2 turn, 1/4 turn, 2/4 turn, 1/6 turn, 4/6 turn, 3/12 turn, 1/2 + 1/4 turn, and 1/8 + 1/6 turn.
Guess the measure of turns the minute hand of a clock makes in each of the following cases. The initial position of the minute hand is given. Draw the final position of the minute hand on the clock face. Discuss your reasoning in class.
In which direction do the hands of a clock move?
Observe the direction of movement while opening a tap, unscrewing a lid or loosening a nut. Do they move clockwise or anti-clockwise?
The children in a class are playing a game in which the teacher tells them the direction in which they should rotate. Complete the table by filling the direction the children will face on completing the given turns.
| Starting Direction | Turns | Ending Direction |
|---|---|---|
| North | Two right angles, clockwise | |
| South | Two right angles, anti-clockwise | |
| East | Four right angles, anti-clockwise | |
| West | Four right angles, clockwise | |
| North | 5 right angles, clockwise | |
| South | 3 right angles clockwise, right angle clockwise, right angle clockwise | |
| West | right angles clockwise, four right angles anti-clockwise |