SOLUTION: which could not be the length of third side of a triangle if the two of its sides measure 15 feet nd 40 feet?How? 1. 20 ft 2. 30ft 3. 40ft 4.50ft.

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Question 193898: which could not be the length of third side of a triangle if the two of its sides measure 15 feet nd 40 feet?How?
1. 20 ft
2. 30ft
3. 40ft
4.50ft.
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of any two sides of a triangle must be larger than the length of the remaining side.
1) 20 + 15 < 40. So the side cannot be 20
2) 30 + 15 > 40
15+40 > 30
40 + 30 > 15
So 30 can be an answer
3) 40 + 40 > 15
15 + 40 > 40
So 40 can be an answer
4) 50+40 > 15
40+15 > 50
50 + 15 > 40
So 50 can be an answer