The triangle inequality (communication modules)?

Why is |a+b| <= |a| + |b| is called the triangle inequality? After all, inequality cocked hat is a <= b + c. As from the inequality of the triangle displays a |a+b| <= |a| + |b|?
March 20th 20 at 11:19
1 answer
March 20th 20 at 11:21
Consider the sum of the two vectors according to the rule of the triangle and this triangle apply the inequality, get the required approval.

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