SOLUTION: two sides of triangle have sides 6 and 21. The length of the third side must be greater than _______ and less than _____

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Question 500634: two sides of triangle have sides 6 and 21. The length of the third side must be greater than _______ and less than _____
Answer by cleomenius(959) About Me  (Show Source):
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By the Triangle inequality theorem, any two sides of a triangle must be greater than the third.
So, the third side must be > 15 so as 6 plus 15 > 21.
The third side must be < 27, so the sum of 6 and 21 is greater than the third side.
21 < x < 27.
Cleomenius