Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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Transcribed Image Text:---
### Geometry Problem: Perimeter of Quadrilateral ABCD
**Question:**
What is the perimeter of quadrilateral ABCD?
**Given Diagram:**
The diagram shows a quadrilateral ABCD with the following specifications:
- AB and AD are equal in length with each measuring 8 units.
- BC and DC are equal in length with each measuring 12 units.
- The internal segment lengths given are AC = 5 units and BD = 8 units.
**Answer Choices:**
- A. \( 8\sqrt{13} + 2\sqrt{89} \)
- B. \( 2\sqrt{13} + \sqrt{89} \)
- C. 108
- D. Not enough information
### Diagram Description:
The quadrilateral is divided into four smaller triangles by the diagonals AC and BD. The intersection of these diagonals divides them into the given lengths.
**Point-wise data:**
- AB = 8 units
- AD = 8 units
- AC = 5 units
- BD = 8 units
- BC = 12 units
- DC = 12 units
### Solution Approach:
1. Identify the lengths of all sides and diagonals of the quadrilateral.
2. Use geometric properties or Pythagorean Theorem to find any additional sides if necessary.
3. Calculate the perimeter as the sum of the lengths of all four sides.
### Detailed Explanation of Diagram:
The quadrilateral is symmetric about the diagonal BD which divides it into two triangles ABD and BCD.
To calculate the perimeter of ABCD:
Calculate the perimeter as the sum of the sides:
Perimeter = AB + BC + CD + DA
Plug in the values:
Perimeter = 8 + 12 + 12 + 8 = 40 units
However, considering the given answer choices might involve misunderstood calculations; we should double-check for possible mistakes or misinterpretations in figure lengths or the need to further explore the geometric properties.
Thus, the only correct answer based on visual inspection and given side lengths is: \(
Option D: not enough information (indicating a mismatch or further calculation might be needed).
---
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