6th Grade Triangle Inequality Quizzes, Questions & Answers

6th Grade

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Triangle Inequality Quiz: Master Triangle Inequality Quiz

How can you quickly decide whether three side lengths can form a triangle? In this quiz, you’ll explore the triangle inequality and see how each pair of sides must add up to more than the remaining side. You’ll...

Questions: 20 | Attempts: 13 | Last updated: May 18, 2026

Sample Question 1
Which set of side lengths can form a triangle?

2, 3, 6

4, 7, 12

5, 9, 13

8, 10, 25

Sample Question 2
In any triangle with side lengths a, b, c, all three must hold: a+b greater than c, b+c greater than a, and c+a greater than b.

True

False

Sample Question 3
If two sides are 7 and 12, the third side x must satisfy which inequality?

5 less than x less than 19

5 less than or equal to x less than or equal to 19

7 less than x less than 12

0 less than x less than 19

6th Grade Triangle Inequality Quizzes, Questions & Answers

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