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88 Chapter 2: Trigonometry
Assess Your Understanding
2.1
1. Determine the measure of each indicated angle to the nearest degree.
a) b) D
F c)
A
2 cm
B
8 cm
C
4. Determine the length of each indicated side to the nearest tenth of a
centimetre.
a) b)
6 cm
E
4 cm
2. Why does the tangent of an angle increase as the angle increases?
3. A small plane is flying at an
altitude of 1000 m and is 5000 m
from the beginning of the
landing strip. What is the angle
between the ground and the line
of sight from an observer at the
beginning of the landing strip?
Give the measure to the nearest
tenth of a degree.
2.2
K
6.2 cm 61°
N
n
10.8 cm
5. A hiker saw a hoodoo on a cliff
at Willow Creek in Alberta’s
badlands. The hiker was 9.1 m
from the base of the cliff. From
that point, the angle between the
level ground and the line of sight
to the top of the hoodoo was 69°.
About how high was the top of the
hoodoo above the level ground?
M
Q
P
56°
p
R
c)
T
H
27°
16
S
s
20
G
5.3 cm
V
J