Question

in triangle abc , ab + bc -------- ca​

Answer 1

Answer:

Theorem: In a triangle, the length of any side is less than the sum of the other two sides. So in a triangle ABC, |AC| < |AB| + |BC|. (Also, |AB| < |AC| + |CB|; |BC| < |BA| + |AC|.) This is an important theorem, for it says in effect that the shortest path between two points is the straight line segment path.