Angle an angle is a figure formed by two rays with the same initial point.

The figure formed by two rays with the same initial point is know as a ray (b) a line (c) an angle (d) a line segment

ANGLES AT A POINT Angles formed by a number of rays having a common initial point are called angles at a point.

two particles are projected upwards with the same initial velocity v_(0) in two different angles of projection such that their horizontal ranges are the same. The ratio of the heights of their horizontal ranges are the same. The ratio of the heights of their highest point will be

Complete angle if a rotating ray after making a complete revolution coincide with the initial position the angle formed is called a complete angle.

A ray of light falls on a glass slab making an angle of 45^(@) with normal. The emergent ray makes the same angle with normal. It shows that

Two identical balls are projected, one vertically up and the other at an angle of 30^(@) to the horizontal, with same initial speed. The potential energy at the highest point is in the ratio:

Two particles A and B are projected in same vertical plane as shown in figure.Their initial positions (t=0) , initial spped and angle of projections are indicated in the diagram.If initial angle of projection theta_(B)=37^(@) , what should be initial speed of projection of particle B , so that it hits particle A . U_(A)=60m//s

In given figure, name all rays with initial points as A, B and C respectively.