By the Triangle Inequality Theorem which set of side lengths could create a triangle? A) 5, 10, 4 B) 5, 7, 13 C) 7, 9, 3 D) 10, 4, 5

Question

Mathematics

Dickens

27 February, 16:58

By the Triangle Inequality Theorem which set of side lengths could create a triangle? A) 5, 10, 4 B) 5, 7, 13 C) 7, 9, 3 D) 10, 4, 5

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Answers (1)

Know the Answer?

Mattie Lang · Answer 1

The correct answer is C.

Triangle inequality means 2 sides of the triangle added up must be longer than the remaining side. Therefore, to find the correct answer quickly, we can add up the shortest 2 sides and see if they exceed the remaining side.

For A,

5 + 4 = 9

9 < 10

Therefore, A is incorrect.

For B,

5 + 7 = 12

12 < 13

Therefore, B is not correct.

For C,

7 + 3 = 10

10 > 9

C is the correct answer.

Heres D, to make sure the answer C is correct.

4 + 5 = 9

9 < 10

D is not correct.

Let's add up the remaining sides to make sure C completely satisfies the rule.

9 + 3 = 12

12 > 7

7 + 9 = 16

16 > 3

Therefore, the answer is C.