Which of the following could not be the third side of the triangle if - ProProfs
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Which of the following could not be the third side of the triangle if a triangle has sides of lengths 3 and 7?



A. 14
B. 5
C. 8
D. 9
E. 11

This question is part of SAT Maths Practice Questions : Focus on Geometry Problems
Asked by Proprofs on Sep 15, 2016

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4 Answers

nqjjqueen

Nqjjqueen

Answered on May 21, 2017

It said that the side cannot exceed the sum of 3+7 but 14 also exceeds that sum but is considered wrong. Why?
 Reply

John Adney

John Adney

Answered on Apr 23, 2017

Using Pythagorean Theorem, none of these answers could be correct. There are two correct answers which are: squareroot(56), and squareroot(40).
 Reply

John Adney

John Adney

Answered on Jan 28, 2017

14 is bigger than 3+7 also so 14 is also correct
 Reply

John Smith

John Smith

Answered on Sep 15, 2016

14
2. 11

One side of a triangle must not exceed the sum of the other two sides in length. 11 is greater than 3 + 7, so 11 cannot be a side.
 Reply

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