   Chapter 11.4, Problem 30E Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Solutions

Chapter
Section Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

In Exercises 29 to 34, use the Law of Sines or the Law of Cosines to solve each problem. Angle measures should be found to the nearest degree and areas and distances to the nearest tenth of a unit.Phil and Matt observe a balloon. They are 500  ft apart, and their angles of observation are 47 ∘ and 65 ∘ , as shown. Find the distance x from Matt to the balloon. To determine

To find:

The distance x from matt to the balloon.

Explanation

Formula:

The Law of sines,

sinαa=sinβb=sinγc

Where α, β, and γ is the angle of the triangle, and a, b, and c is the sides of the triangle.

Calculation:

Given,

Phil and Matt observe a balloon.

They are 500 ft apart, and their angles of observation are 47 and 65 are shown below.

Let A and B were Phil and Matt’s position respectively and C is the balloon’s position with angle α.

Then, AB¯=500 ft , BC¯=x , B=65 , and A=47

a=500 ft , b=x , β=65 , and γ=47

Find x:

For any triangle,

α+β+γ=180

Here,  β=65  and  γ=47

α+47+65=180

α+112=180

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