An angle is formed when two straight lines meet at a point.
Here, line A meets line B at point C. It makes an angle there.
An angle is represented by the symbol ‘∠’ and is measured in ‘degrees or °.
When two straight lines meet each other, they form a right angle.
It is represented by a small square at the point where the lines meet.
The measure of a right angle is 90°.
Turn from the yellow line to the orange line is a quarter turn.
One-quarter turn is the same as one right angle.
Turning the from yellow line to the green line is a half turn.
Two quarter turns or two right angles make one-half turn.
Three quarter Turn
Turning from the yellow line to the blue line is called the three-quarter turn.
Three right angles make a three-quarter turn.
Clockwise and Anti-clockwise
Clockwise means turning the same way the hands on a clock.
Anti-clockwise means turning the opposite way in the directions of the hands on a clock.
Let’s try a question.
If the hour hand of the clock takes a clockwise quarter turn, what time will be shown by the clock?
The hour hand will be at 6.