**Angle of Depression**

**Definition of Angle of Depression**

**Examples of Angle of Depression**

**Solved Example on Angle of Depression**

An airplane is flying at an altitude of 1000 m. From the plane the angle of depression of a tree on the ground is measured as 15°. What is the distance from the plane to the tree?

**Choices:**

A. 3,864 m

B. 3,732 m

C. 1,035 m

D. 1,000 m

**Correct Answer: A**

**Solution:**

**Step 1:** Let *x* be the distance from the plane to the tree.

**Step 2:** Since the horizontal lines are parallel, the angles of elevation and depression are equal in measure.

**Step 3:**

**Step 4:**

**Step 5:** *x* = 3,864 m

**Step 6:** So, the distance from the airplane to the tree is 3,864 m.

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