Math Problem Statement

Find the measure of segment IJ in the triangle, given the following: angle H = 34°, angle J = 32°, and side HJ = 32.

Solution

The question involves finding the length of the segment IJ\overline{IJ} in the given triangle. Since the triangle has two angles and one side labeled, we can use the law of sines or trigonometric rules to determine the missing segment.

Steps:

  1. Identify the given data:

    • H=34\angle H = 34^\circ
    • J=32\angle J = 32^\circ
    • Side opposite H\angle H: IJ\overline{IJ} (to find).
  2. Find the third angle: The sum of the angles in a triangle is 180180^\circ: I=1803432=114\angle I = 180^\circ - 34^\circ - 32^\circ = 114^\circ

  3. Apply the Law of Sines: The Law of Sines states: Length of a sidesin(Opposite angle)=constant for the triangle.\frac{\text{Length of a side}}{\sin(\text{Opposite angle})} = \text{constant for the triangle.}

    For HIJ\triangle HIJ: IJsin(34)=HJsin(114).\frac{\overline{IJ}}{\sin(34^\circ)} = \frac{\overline{HJ}}{\sin(114^\circ)}.

  4. Solve for IJ\overline{IJ}: Substitute HJ=32\overline{HJ} = 32 (as given): IJ=sin(34)sin(114)×32.\overline{IJ} = \frac{\sin(34^\circ)}{\sin(114^\circ)} \times 32.

  5. Calculate: Use a calculator to find the sine values:

    • sin(34)0.5592\sin(34^\circ) \approx 0.5592,
    • sin(114)0.9135\sin(114^\circ) \approx 0.9135.

    Substituting: IJ=0.55920.9135×3219.6.\overline{IJ} = \frac{0.5592}{0.9135} \times 32 \approx 19.6.

Final Answer:

The length of IJ\overline{IJ} is approximately 19.6 units.

Would you like more explanation or have any additional questions?

Related Questions:

  1. How do you find the length of other sides in a triangle using the Law of Sines?
  2. What is the difference between the Law of Sines and the Law of Cosines?
  3. How can angle measures be verified using trigonometry in non-right triangles?
  4. Can the triangle inequality be applied here, and how does it validate the result?
  5. How would this change if the triangle was a right triangle?

Tip:

Always double-check your angle measures to ensure they add up to 180180^\circ, especially when applying trigonometric laws in triangles.

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Math Problem Analysis

Mathematical Concepts

Trigonometry
Law of Sines
Triangle Geometry

Formulas

Sum of angles in a triangle: angle H + angle J + angle I = 180°
Law of Sines: (side length) / sin(opposite angle) = constant for the triangle

Theorems

Law of Sines

Suitable Grade Level

Grades 9-11