cassiopeia53 cassiopeia53

11-03-2022
Mathematics

contestada

9. If two sides in one triangle are 9 and 21 , then the third side might be
a) 9
b) 11
c) 12
d) 13

Please explain how you got the answer

Respuesta :

jimrgrant1 jimrgrant1

11-03-2022

Answer:

d

Step-by-step explanation:

given 2 sides of a triangle then the third side x is in the range

difference of 2 sides < x < sum of 2 sides , that is

21 - 9 < x < 21 + 9 , so

12 < x < 30

the only value that satisfies the inequality is 13

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