way for the first unification of China in 221 BC. the Zhou as the supreme political power in China. themselves considered this victory to be the beginning of their dynastic reign. The Zhou dynasty is subdivided into two periods: the Western and Eastern Zhou.
Adjacent angles are two angles that have a common vertex and a common side. The vertex of an angle is the endpoint of the rays that form the sides of the angle. When we say common vertex and common side, we mean that the vertex point and the side are shared by the two angles. Here's an example of adjacent angles: In this diagram, point A is the vertex of all of the angles shown.
The angles that are opposite of each other are the alternate interior angles. In the picture below, a and b are alternate interior angles as are c and d. Angle - An angle is a figure formed by two rays sharing a common endpoint called the vertex of the angle.