A pilot spots the start of a runway as he begins his descent.
Which angle indicates an angle of depression?

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A pilot spots the start of a runway as he begins his descent. Which angle indicates an angle of depression?

UpStudy AI · Accepted Answer

An **angle of depression** is the angle formed between the horizontal line of sight and the line of sight downward to an object. In the context of aviation:

- **Pilot's Perspective:**
  - **Horizontal Line:** Imagine a straight, horizontal line extending directly in front of the pilot's eyes.
  - **Line of Sight:** This is the line from the pilot's eyes to the point he's observing—in this case, the start of the runway.

- **Angle of Depression:**
  - The angle between the **horizontal line** and the **line of sight downward** to the runway is the **angle of depression**.
  
![Angle of Depression Diagram](https://i.imgur.com/6JgD4Xb.png)

*Illustration: The horizontal line represents the pilot's eye level. The dashed line shows the line of sight to the runway, and the angle between them is the angle of depression.*

**Key Points:**
- **Measurement:** The angle of depression is measured from the horizontal downward to the line of sight.
- **Equal to Angle of Elevation:** If you were to look up from the runway to the pilot, the angle formed would be the **angle of elevation**, which is equal in measure to the angle of depression due to alternate interior angles formed by parallel lines.

**Example Scenario:**
- If the pilot's horizontal line is perfectly level and his line of sight tilts downward at 3°, then the angle of depression is **3 degrees**.

**Identifying the Angle:**
- Look for the angle that starts at the pilot's eye level (horizontal) and moves downward toward the runway.
- This downward-tilted angle relative to the horizontal is the **angle of depression**.

If you have specific options or a diagram you'd like help with, feel free to share more details!
An **angle of depression** is the angle between the horizontal line of sight and the downward line of sight to the runway. It's measured downward from the horizontal.

A pilot spots the start of a runway as he begins his descent.
Which angle indicates an angle of depression?

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