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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![### Problem 3: Finding the Length of a Segment
**Question:**
Find the length of the segment. Round to the nearest tenth of a unit.
**Diagram:**
The diagram provided is a coordinate plane with two points marked:
- Point S is located at (-1, 2).
- Point T is located at (3, -2).
A line segment connects points S and T.
### Explanation:
To find the length of the segment ST, we use the distance formula for two points \((x_1, y_1)\) and \((x_2, y_2)\):
\[ \text{Distance} = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]
For points \((x_1, y_1) = (-1, 2)\) and \((x_2, y_2) = (3, -2)\):
1. Substitute the coordinates into the distance formula:
\[ \text{Distance} = \sqrt{(3 - (-1))^2 + (-2 - 2)^2} \]
2. Simplify the expressions inside the square root:
\[ \text{Distance} = \sqrt{(3 + 1)^2 + (-2 - 2)^2} \]
\[ \text{Distance} = \sqrt{(4)^2 + (-4)^2} \]
3. Calculate the squares:
\[ \text{Distance} = \sqrt{16 + 16} \]
\[ \text{Distance} = \sqrt{32} \]
4. Simplify the square root:
\[ \text{Distance} = \sqrt{32} \approx 5.7 \]
### Conclusion:
The length of the segment ST, rounded to the nearest tenth, is approximately **5.7 units**.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fae7e7cf3-425c-45db-adb3-f49e9589ee4b%2F5f4cc456-aede-4c6f-a555-c58b087d7b5c%2Firar3cg_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Problem 3: Finding the Length of a Segment
**Question:**
Find the length of the segment. Round to the nearest tenth of a unit.
**Diagram:**
The diagram provided is a coordinate plane with two points marked:
- Point S is located at (-1, 2).
- Point T is located at (3, -2).
A line segment connects points S and T.
### Explanation:
To find the length of the segment ST, we use the distance formula for two points \((x_1, y_1)\) and \((x_2, y_2)\):
\[ \text{Distance} = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \]
For points \((x_1, y_1) = (-1, 2)\) and \((x_2, y_2) = (3, -2)\):
1. Substitute the coordinates into the distance formula:
\[ \text{Distance} = \sqrt{(3 - (-1))^2 + (-2 - 2)^2} \]
2. Simplify the expressions inside the square root:
\[ \text{Distance} = \sqrt{(3 + 1)^2 + (-2 - 2)^2} \]
\[ \text{Distance} = \sqrt{(4)^2 + (-4)^2} \]
3. Calculate the squares:
\[ \text{Distance} = \sqrt{16 + 16} \]
\[ \text{Distance} = \sqrt{32} \]
4. Simplify the square root:
\[ \text{Distance} = \sqrt{32} \approx 5.7 \]
### Conclusion:
The length of the segment ST, rounded to the nearest tenth, is approximately **5.7 units**.
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