29. In triangle GHJ below, points A, B and C are midpoints of the sides. А G When AB 3x + 8 and GJ = 2x + 24, what is AB?

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Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
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### Problem 29: Midpoints in Triangle Geometry

**Problem Statement:**

In triangle \( GHJ \) below, points \( A \), \( B \), and \( C \) are midpoints of the sides.

![Triangle Diagram](image_url_placeholder) 

The diagram shows triangle \( GHJ \) with an inner triangle \( ABC \) formed by connecting the midpoints of the sides. Here, \( A \) is the midpoint of \( GH \), \( B \) is the midpoint of \( HJ \), and \( C \) is the midpoint of \( GJ \).

**Given:**
- \( AB = 3x + 8 \)
- \( GJ = 2x + 24 \)

**Question:**
What is the length of \( AB \)?

**Options:**
- 8
- 14
- 24
- 28

### Detailed Explanation of the Diagram:
The diagram is essential for understanding the placement of points and segments in this midpoints problem:

- The largest triangle is \( GHJ \).
- Points \( A \), \( B \), and \( C \) are aligned such that each divides the sides \( GH \), \( HJ \), and \( GJ \) into equal segments.
- The smaller triangle \( ABC \) is formed inside \( GHJ \) by connecting these midpoints.

### Steps to Solve:
1. **Understanding Midpoints:**
   - As \( A \) is the midpoint of \( GH \), \( B \) is the midpoint of \( HJ \), and \( C \) is the midpoint of \( GJ \), each mid-segment (e.g., \( AB \)) is half the length of its corresponding base segment (in this case, \( GJ \)).

2. **Setting Up the Equation:**
   - Given that \( AB \) is half of \( GJ \):
     \[
     AB = \frac{1}{2} GJ
     \]
   - Substituting the given expressions:
     \[
     3x + 8 = \frac{1}{2} (2x + 24)
     \]

3. **Solving the Equation:**
   - Simplifying the right-hand side:
     \[
     3x + 8 = x + 12
     \]
   - Rearranging terms to isolate \( x \
Transcribed Image Text:### Problem 29: Midpoints in Triangle Geometry **Problem Statement:** In triangle \( GHJ \) below, points \( A \), \( B \), and \( C \) are midpoints of the sides. ![Triangle Diagram](image_url_placeholder) The diagram shows triangle \( GHJ \) with an inner triangle \( ABC \) formed by connecting the midpoints of the sides. Here, \( A \) is the midpoint of \( GH \), \( B \) is the midpoint of \( HJ \), and \( C \) is the midpoint of \( GJ \). **Given:** - \( AB = 3x + 8 \) - \( GJ = 2x + 24 \) **Question:** What is the length of \( AB \)? **Options:** - 8 - 14 - 24 - 28 ### Detailed Explanation of the Diagram: The diagram is essential for understanding the placement of points and segments in this midpoints problem: - The largest triangle is \( GHJ \). - Points \( A \), \( B \), and \( C \) are aligned such that each divides the sides \( GH \), \( HJ \), and \( GJ \) into equal segments. - The smaller triangle \( ABC \) is formed inside \( GHJ \) by connecting these midpoints. ### Steps to Solve: 1. **Understanding Midpoints:** - As \( A \) is the midpoint of \( GH \), \( B \) is the midpoint of \( HJ \), and \( C \) is the midpoint of \( GJ \), each mid-segment (e.g., \( AB \)) is half the length of its corresponding base segment (in this case, \( GJ \)). 2. **Setting Up the Equation:** - Given that \( AB \) is half of \( GJ \): \[ AB = \frac{1}{2} GJ \] - Substituting the given expressions: \[ 3x + 8 = \frac{1}{2} (2x + 24) \] 3. **Solving the Equation:** - Simplifying the right-hand side: \[ 3x + 8 = x + 12 \] - Rearranging terms to isolate \( x \
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