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guapka [62]
3 years ago
8

As a part of their weather unit, Anoki’s science class took a hot air balloon ride. As they passed over a fenced field, the angl

e of depression of the closer side of the fence was 32°, and the angle of depression of the farther side of the fence was 27°. If the height of the balloon was 800 feet, estimate the width of the field. Round your answer to the nearest foot. 2016_01_25_17_23_501.png The width of the field is about feet

Mathematics
1 answer:
yulyashka [42]3 years ago
7 0
Please refer to the figure attached for the diagram of this problem.

Steps needed to find the width of the field (CD):

First, we should note that angle d would be equal to 27 degrees because there are two parallel lines that are cut by a transversal. Furthermore, angle a would be equal to 5 degrees since we just need to subtract 27 from 32.

We then subtract 27 and 5 from 180 to get angle c. 180-27-5=148. Angle c is therefore 148 degrees.

Next, we need to find angle e which is just the supplementary of angle c. Angle e therefore measures 180-148=32 degrees.

For the next step we use sine law to find the length of segment AC:
\frac{sin(32)}{800} = \frac{sin(90)}{AC}
AC=1509.66

Lastly, we need to utilize the sine law again to find the length of segment CD or the width of the field:
\frac{sin(27)}{1509.66} = \frac{sin(5)}{CD}
CD=290

ANSWER: The width of the field is 290 ft.

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