Question

explain with diagram angle, arm, vertex​

Answer 1

Angle : An angle can be defined as the figure formed by two rays meeting at a common end point. An angle is represented by the symbol ∠. Here, the angle above is ∠A. Angles are measured in degrees, using a protractor.

Arms : The two rays joining to form an angle are called arms of an angle. Here, OA and OB are the arms of the ∠AOB.

Vertex : The common end point at which the two rays meet to form an angle is called the vertex. Here, the point O is the vertex of ∠AOB.