The lengths of three sides of a triangle are m units, n units, and p units, respectively. which inequality must be true?

a) m > n + p

b) n < m + p

c) p > m + n

d) p < m – n

n < m + p

Step-by-step explanation:

If ABC is a triangle then the sum of any two sides of ABC will be greater than the third side i.e. AB + BC > CA or BC + CA > AB or CA + AB > BC.

Now, if the lengths of three sides of a triangle are m units, n units, and p units respectively.  

Then the inequality must be true is n < m + p,  where m + p is the sum of any two sides which is greater than the third side of n length. (Answer)

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step-by-step explanation: