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

{4,10,14}

{12,25,36}

{6,8,14}

{15,30,46}

Which of the following sets of numbers could represent the three sides of a triangle?\newline{4,10,14} \{4,10,14\} \newline{12,25,36} \{12,25,36\} \newline{6,8,14} \{6,8,14\} \newline{15,30,46} \{15,30,46\}

Full solution

Q. Which of the following sets of numbers could represent the three sides of a triangle?\newline{4,10,14} \{4,10,14\} \newline{12,25,36} \{12,25,36\} \newline{6,8,14} \{6,8,14\} \newline{15,30,46} \{15,30,46\}
  1. Recall Triangle Inequality Theorem: Recall the Triangle Inequality Theorem which 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 {4,10,14}\{4,10,14\}: Apply the Triangle Inequality Theorem to the first set {4,10,14}\{4,10,14\}. Check if 4 + 10 > 14, 4 + 14 > 10, and 10 + 14 > 4. 4+10=144 + 10 = 14 which is not greater than 1414, so the first set does not satisfy the Triangle Inequality Theorem.
  3. Apply Theorem to Set {12,25,36}\{12,25,36\}: Apply the Triangle Inequality Theorem to the second set {12,25,36}\{12,25,36\}. Check if 12 + 25 > 36, 12 + 36 > 25, and 25 + 36 > 12. 12+25=3712 + 25 = 37 which is greater than 3636, 12+36=4812 + 36 = 48 which is greater than 2525, but 25+36=6125 + 36 = 61 which is not greater than {12,25,36}\{12,25,36\}00, so the second set does not satisfy the Triangle Inequality Theorem.
  4. Apply Theorem to Set {6,8,14}\{6,8,14\}: Apply the Triangle Inequality Theorem to the third set {6,8,14}\{6,8,14\}. Check if 6 + 8 > 14, 6 + 14 > 8, and 8 + 14 > 6. 6+8=146 + 8 = 14 which is not greater than 1414, so the third set does not satisfy the Triangle Inequality Theorem.
  5. Apply Theorem to Set {15,30,46}\{15,30,46\}: Apply the Triangle Inequality Theorem to the fourth set {15,30,46}\{15,30,46\}. Check if 15 + 30 > 46, 15 + 46 > 30, and 30 + 46 > 15. 15+30=4515 + 30 = 45 which is not greater than 4646, so the fourth set does not satisfy the Triangle Inequality Theorem.

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