Introduction about Triangle

TRIANGLE:
    A POLYGON HAVING THREE SIDES IS KNOWN AS TRIANGLE.

Fig.1.1

Simply,as given in fig.1.1

ABC IS Triangle

In which;AB,BC,CA are sides of Triangle.

NOTE:AB,BC,CA also called as line segment.

Now, next we are talking about the angles of  Triangle.

Fig1.2

As shown in fig1.2

The green colour mark tell about the angles