Q. Which of the following sets of numbers could represent the three sides of a triangle?{12,19,31}{10,25,37}{10,15,26}{7,21,27}
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.
Apply Theorem to First Set: Apply the Triangle Inequality Theorem to the first set 12,19,31. Check if the sum of the two smallest numbers is greater than the largest number: 12 + 19 > 31?
Calculate First Set: Perform the calculation for the first set: 12+19=31. Since 31 is not greater than 31, the first set does not satisfy the Triangle Inequality Theorem.
Apply Theorem to Second Set: Apply the Triangle Inequality Theorem to the second set {10,25,37}. Check if the sum of the two smallest numbers is greater than the largest number: 10 + 25 > 37?
Calculate Second Set: Perform the calculation for the second set: 10+25=35. Since 35 is not greater than 37, the second set does not satisfy the Triangle Inequality Theorem.
Apply Theorem to Third Set: Apply the Triangle Inequality Theorem to the third set {10,15,26}. Check if the sum of the two smallest numbers is greater than the largest number: 10 + 15 > 26?
Calculate Third Set: Perform the calculation for the third set: 10+15=25. Since 25 is not greater than 26, the third set does not satisfy the Triangle Inequality Theorem.
Apply Theorem to Fourth Set: Apply the Triangle Inequality Theorem to the fourth set {7,21,27}. Check if the sum of the two smallest numbers is greater than the largest number: 7 + 21 > 27?
Calculate Fourth Set: Perform the calculation for the fourth set: 7+21=28. Since 28 is greater than 27, the fourth set satisfies the Triangle Inequality Theorem.
Conclude Valid Triangle Set: Conclude that the fourth set {7,21,27} is the only set that could represent the sides of a triangle.
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