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Let’s explore some special types of angles with a different example.

1. Straight Angle and Right Angle

Now, think about this straight angle, ∠AOB, where A and B are points on the door and wall, and O is
the hinge.

If you place a piece of string from the hinge (O) to the edge of the door (C), this string will divide the
straight angle into two smaller angles, ∠AOC and ∠COB.

The question is: Can you place the string so that these two angles are equal?

Here’s how you can find out:
 Folding Paper: Imagine you have a piece of paper that you fold in half. The fold represents a
line that divides a straight angle into two equal parts.

 Right Angles: The two equal angles formed are called right angles. A straight angle contains
two right angles. When the door is opened to form a right angle with the wall, it looks like an
‘L’. This is half of a straight angle.