Which of the following cannot be X? A triangle has sides of length 7, - ProProfs Discuss
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Which of the following cannot be X? A triangle has sides of length 7, 11, and X.

Which of the following cannot be X? A triangle has sides of length 7, 11, and X.

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A. 2
B. 4
C. 8
D. 12
E. 18

This question is part of sat math questions i

Asked by Harrison, Last updated: Dec 01, 2020

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3 Answers

AnnJ

AnnJ

AnnJ
AnnJ

Answered Jun 02, 2017

18 is also impossible, because the sum of two lenghts cannot be equal with the third, that means that the angle between sides 7 and 11 is 180, and that makes it... a line.
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John Adney

John Adney

John Adney
John Adney

Answered May 30, 2017

The answer is clearly 2- if one side is 11 and the other is 7 the 3rd side must be long enough to reach look at the possible length of the 3rd side- if the 7 is on one side of the 11 side and the x is on the other if x were 2 then even with angels of 0 degrees the 7 side would not connect with the x side
​to make a triangle the sum of the 2 smaller sides must equal more than the largest side
7+2 <11
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John Smith

John Smith

John Smith
John Smith

Answered Sep 11, 2016

2
The sum of lengths of two sides of a triangle cannot be less than the length of the third side. So, 2 + 7 = 9, but 9 < 11
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