9. Is it a triangle or not? Show work to support your answer. a.) 7,12, 15 b.) 6,8, 12 c.) 5, 4, 3

Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE: 1. Give the measures of the complement and the supplement of an angle measuring 35°.
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### Understanding Triangle Validity Using Sides

**Problem Statement:**
Determine if the given sets of numbers can form a triangle. Use mathematical calculations to support your answer.

1. **Sides Provided:**
   a.) 7, 12, 15
   b.) 6, 8, 12
   c.) 5, 4, 3

### Solution Explanation:

To determine if three sides form a triangle, we use the Triangle Inequality Theorem. This theorem states that for any three sides to form a triangle:
1. The sum of any two sides must be greater than the third side.

Let's evaluate each set:

#### a.) Sides 7, 12, 15
1. Check: 7 + 12 > 15 → 19 > 15 (True)
2. Check: 7 + 15 > 12 → 22 > 12 (True)
3. Check: 12 + 15 > 7 → 27 > 7 (True)

Since all conditions satisfy the triangle inequality theorem, the sides 7, 12, 15 **can** form a triangle.

#### b.) Sides 6, 8, 12
1. Check: 6 + 8 > 12 → 14 > 12 (True)
2. Check: 6 + 12 > 8 → 18 > 8 (True)
3. Check: 8 + 12 > 6 → 20 > 6 (True)

Since all conditions satisfy the triangle inequality theorem, the sides 6, 8, 12 **can** form a triangle.

#### c.) Sides 5, 4, 3
1. Check: 5 + 4 > 3 → 9 > 3 (True)
2. Check: 5 + 3 > 4 → 8 > 4 (True)
3. Check: 4 + 3 > 5 → 7 > 5 (True)

Since all conditions satisfy the triangle inequality theorem, the sides 5, 4, 3 **can** form a triangle.

### Conclusion:
Each of the given sets of sides can form a triangle. All sets meet the criteria set by the Triangle Inequality Theorem, thus verifying their validity to form triangles.
Transcribed Image Text:### Understanding Triangle Validity Using Sides **Problem Statement:** Determine if the given sets of numbers can form a triangle. Use mathematical calculations to support your answer. 1. **Sides Provided:** a.) 7, 12, 15 b.) 6, 8, 12 c.) 5, 4, 3 ### Solution Explanation: To determine if three sides form a triangle, we use the Triangle Inequality Theorem. This theorem states that for any three sides to form a triangle: 1. The sum of any two sides must be greater than the third side. Let's evaluate each set: #### a.) Sides 7, 12, 15 1. Check: 7 + 12 > 15 → 19 > 15 (True) 2. Check: 7 + 15 > 12 → 22 > 12 (True) 3. Check: 12 + 15 > 7 → 27 > 7 (True) Since all conditions satisfy the triangle inequality theorem, the sides 7, 12, 15 **can** form a triangle. #### b.) Sides 6, 8, 12 1. Check: 6 + 8 > 12 → 14 > 12 (True) 2. Check: 6 + 12 > 8 → 18 > 8 (True) 3. Check: 8 + 12 > 6 → 20 > 6 (True) Since all conditions satisfy the triangle inequality theorem, the sides 6, 8, 12 **can** form a triangle. #### c.) Sides 5, 4, 3 1. Check: 5 + 4 > 3 → 9 > 3 (True) 2. Check: 5 + 3 > 4 → 8 > 4 (True) 3. Check: 4 + 3 > 5 → 7 > 5 (True) Since all conditions satisfy the triangle inequality theorem, the sides 5, 4, 3 **can** form a triangle. ### Conclusion: Each of the given sets of sides can form a triangle. All sets meet the criteria set by the Triangle Inequality Theorem, thus verifying their validity to form triangles.
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