|Class 6 Maths Basic Geometrical Ideas||Angles|
Angle can be also called as “corner’. By this, an angle is made when any two or more rays starting from the same vertex point.
We can see that; two rays OA and OB is originating from the common point O. where OA and OB are called arms or sides of the angle and O is called vertex. Angle can be labelled by using English alphabets and can be written as angle AOB or angle BOA. Angle can also be demonstrated by using a symbol ‘∠’ Hence, angle for the above figure can be written as, ∠AOB or ∠BOA
Let us take a different scenario where four rays are originating from a common point.
In the above figure, we have four rays also termed as arms, i.e. OA, OB, OD, OC originating from a vertex O. Angles formed are, ∠AOB or ∠BOA, ∠AOD or ∠DOA, ∠BOC or ∠COB, ∠DOC or ∠COD
Note: While labelling an angle, the vertex is always written as the middle letter.
Question: Name the angles in the given figure:
Angles are: ∠ABC, ∠BCD, ∠CDA, ∠DAB