Triangles and Its Properties Class 7 Notes: Chapter 6
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.The difference between the lengths of any two sides of a triangle is lesser than the third side. This property is useful in knowing if it is possible to draw a triangle when the lengths of the three sides are known. Please refer The Triangle and its Properties Class 7 Notes for more revision notes.
CBSE Revision Notes 