What is the Triangle Inequality Theorem?
Inequalities in Triangles

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•
Mathematics
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
2.
FLASHCARD QUESTION
Front
If two sides of a triangle are 8 and 10, what is the range of possible lengths for the third side?
Back
The range of possible lengths for the third side is 2 < x < 18.
3.
FLASHCARD QUESTION
Front
What is the relationship between the angles and sides of a triangle?
Back
In a triangle, the largest angle is opposite the longest side, and the smallest angle is opposite the shortest side.
4.
FLASHCARD QUESTION
Front
What cannot be the length of the third side if the other two sides are 5 and 7?
Back
The third side cannot be 13, as 5 + 7 must be greater than the third side.
5.
FLASHCARD QUESTION
Front
Define an obtuse triangle.
Back
An obtuse triangle is a triangle that has one angle greater than 90 degrees.
6.
FLASHCARD QUESTION
Front
What is the sum of the angles in any triangle?
Back
The sum of the angles in any triangle is always 180 degrees.
7.
FLASHCARD QUESTION
Front
If the sides of a triangle are 3, 4, and 5, what type of triangle is it?
Back
It is a right triangle, as it satisfies the Pythagorean theorem (3^2 + 4^2 = 5^2).
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