Solving Right Triangles

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Section 8.1

• Solving Right Triangles
• Emphasis on Applications
• of Right Triangles

Announcement If you are considering withdrawing
from the course, you must do it this week. I will
have complete grades posted on the VISTA grade
book by tonight at midnight. See your syllabus
for the distribution of points.
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c
a
b
To solve a right triangle means to find the
missing lengths of its sides and the measurements
of its angles.
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c
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b
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c
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b
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h
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APPLICATION PROBLEM
Yuli just planted an Elm tree. The nursery
claims the tree grows 12 feet per year. Yuli
wants to verify the claim. She walks 100 feet
from the base of the tree and, using a transit
that is 2 feet off the ground, determines the
angle of elevation is 5.7o. One year later, the
angle of elevation 100 feet from the tree is
11.9o. Is the nurserys claim true?
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g
h
100 feet
2 feet
h height of tree above transit
g growth of tree during first year
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Height of tree after 1 year 2 9.98 11.09
23.07 feet