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Which of the following sets of numbers could represent the three sides of a triangle?

{13,22,32}

{11,22,33}

{14,20,36}

{15,21,37}

Which of the following sets of numbers could represent the three sides of a triangle?\newline{13,22,32} \{13,22,32\} \newline{11,22,33} \{11,22,33\} \newline{14,20,36} \{14,20,36\} \newline{15,21,37} \{15,21,37\}

Full solution

Q. Which of the following sets of numbers could represent the three sides of a triangle?\newline{13,22,32} \{13,22,32\} \newline{11,22,33} \{11,22,33\} \newline{14,20,36} \{14,20,36\} \newline{15,21,37} \{15,21,37\}
  1. Recall Triangle Inequality Theorem: Recall the Triangle Inequality Theorem.\newlineThe 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. Apply Theorem to Set {13,22,32}\{13,22,32\}: Apply the Triangle Inequality Theorem to the first set {13,22,32}\{13,22,32\}.\newlineCheck if 13 + 22 > 32, 13 + 32 > 22, and 22 + 32 > 13.\newline13+22=3513 + 22 = 35, which is greater than 3232.\newline13+32=4513 + 32 = 45, which is greater than 2222.\newline22+32=5422 + 32 = 54, which is greater than {13,22,32}\{13,22,32\}00.\newlineAll conditions are satisfied, so {13,22,32}\{13,22,32\} could represent the sides of a triangle.
  3. Apply Theorem to Set {11,22,33}\{11,22,33\}: Apply the Triangle Inequality Theorem to the second set {11,22,33}\{11,22,33\}. Check if 11 + 22 > 33, 11 + 33 > 22, and 22 + 33 > 11. 11+22=3311 + 22 = 33, which is not greater than 3333. This set does not satisfy the Triangle Inequality Theorem, so {11,22,33}\{11,22,33\} cannot represent the sides of a triangle.
  4. Apply Theorem to Set {14,20,36}\{14,20,36\}: Apply the Triangle Inequality Theorem to the third set {14,20,36}\{14,20,36\}. Check if 14 + 20 > 36, 14 + 36 > 20, and 20 + 36 > 14. 14+20=3414 + 20 = 34, which is not greater than 3636. This set does not satisfy the Triangle Inequality Theorem, so {14,20,36}\{14,20,36\} cannot represent the sides of a triangle.
  5. Apply Theorem to Set 15,21,37{15,21,37}: Apply the Triangle Inequality Theorem to the fourth set 15,21,37{15,21,37}. Check if 15 + 21 > 37, 15 + 37 > 21, and 21 + 37 > 15. 15+21=3615 + 21 = 36, which is not greater than 3737. This set does not satisfy the Triangle Inequality Theorem, so 15,21,37{15,21,37} cannot represent the sides of a triangle.

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