Transcript eye - level - TeacherWeb

Lesson 13 Finding Lengths
Objective: To use basic
Trigonometric functions to solve
word problems.
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
Mathematics Curriculum Centre
eye - level
eye - level
Mathematics Curriculum Centre
eye - level
eye - level
Mathematics Curriculum Centre
eye - level
eye - level
The angles are equal – they are alternate angles
Word Problems
Mathematics Curriculum Centre

Make a sketch of the situation to help to
solve the problem.
Mathematics Curriculum Centre
h
25

70
h = 23.49
Problem
Mathematics Curriculum Centre

If the distance of a person from a tower is
100 m and the angle elevation to the top
of the tower with the ground is 30o, what
is the height of the tower in meters?
x
Tan30 =
100
x = 57.74 m
30o
100m
Problem
Mathematics Curriculum Centre

Two towers face each other separated by
a distance d = 40 m. As seen from the top
of the first tower, the angle of depression
of the second tower's base is 60o. What is
the height (in meters) of the first tower?