Math Problem Statement

Find x in the figure below, rounded to one decimal place. A triangle is given. The first side of the triangle is horizontal and is labeled x. The second side of the triangle is at an angle of 30° with the first side. The third side of the triangle is at an angle 60° with the first side. A vertical line segment labeled 110 connects a vertex of the triangle to the first side at a right angle. x = 220

Incorrect: Your answer is incorrect.

Solution

To solve for xx in the triangle, we need to consider the geometry of the problem described. Here's the step-by-step process:

Given:

  • A triangle with one side labeled xx (horizontal).
  • The second side makes a 30° angle with the first side.
  • The third side makes a 60° angle with the first side.
  • There is a vertical line segment labeled 110 that connects a vertex to the first side at a right angle.

Assumptions based on the description:

  1. The vertical segment labeled 110 is the height of the triangle (altitude) from the vertex opposite the base (horizontal side xx) to the base itself.
  2. The triangle is split by this height, making two right triangles.

To find xx, we can use the properties of right triangles and trigonometry.

Strategy:

The height of 110 creates two right-angled triangles with angles of 30° and 60°.

In the triangle with a 30° angle:

  • The height (110) is opposite the 30° angle.
  • Use the tangent function, where:
    tan(30)=oppositeadjacent=110adjacent side.\tan(30^\circ) = \frac{{\text{opposite}}}{{\text{adjacent}}} = \frac{110}{\text{adjacent side}}. From this, we can solve for the adjacent side (the distance from the point of the vertex to the line at a 30° angle).

For the triangle with a 60° angle:

  • The height is also opposite the 60° angle.
  • Use the tangent function: tan(60)=oppositeadjacent=110adjacent side.\tan(60^\circ) = \frac{{\text{opposite}}}{{\text{adjacent}}} = \frac{110}{\text{adjacent side}}.

By combining the results from these steps, we will be able to determine the value of xx.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Right Triangles
Tangents
Angles in Triangles

Formulas

tan(30°) = opposite / adjacent
tan(60°) = opposite / adjacent

Theorems

Properties of right triangles
Trigonometric functions

Suitable Grade Level

Grades 9-11