Which of the following cannot be X? A triangle has sides of length 7, - ProProfs Discuss
Topics
Products
Follow Us:

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.

Change Image    Delete

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

This question is part of

SAT Math Questions I
Asked by Harrison, Last updated: Jun 02, 2020

+ Answer
Request

5 Answers

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.
 1

amsr

Amsr

Replied on Jul 25, 2017

If you look at it that way, neither can be 4, since 7+4=11. Possible answers are 4, 2 and 18

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
 

John Adney

John Adney

Answered Dec 03, 2016

There are two answers. Not only can the two sides not only be smaller than another than the other they also can not be equal when added together therefore 18 is also correct because 7+11=18
 

John Adney

X=4 & x=18 are other values along with x=2 which are not possible
 

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
 3

Iskimotu

18 is impossible too if you define what a triangle must have an acreage.

John Adney

X=4 & x=18 both are also not possible

John Adney

A triangle will not be a triangle if the sum of one side is the same or greater than the sum of the other two sides there fore it must be 18.

Search for Google images
Select a recommended image
Upload from your computer
Search for Google images
Select a recommended image
Upload from your computer
Search for Google images
Select a recommended image
Upload from your computer

Email Sent
We have sent an email to your address "" with instructions to reset your password.