Triangles can be classified by their sides and angles. There are three types of triangles based on side length: equilateral triangles have all three sides of equal length, isosceles triangles have two sides of equal length, and scalene triangles have all three sides of different lengths.

2.  Can be classified into sides & angles.
 SIDES:
EQUILATERAL;ISOSCELES;SCALENE
TRIANGLES
 EQUILATERAL TRIANGLE: ALL THE SIDES
OF EQUAL LENGTH
 ISOSCELES TRIANGLE: 2 SIDES OF
EQUAL LENGTH
 SCALENE TRIANGLE: 3 SIDES ARE OF
DIFFERENT LENGTH