In the diagram below, BC is an altitude of ABD. To the nearest whole unit, what is the length of CD?
2 answers:
First we need to calculate the 2 angles that make up Angle B at the top of the triangle.
Using that angle we can find the length of CD.
See the attached picture:
Using that angle we can find the length of CD.
See the attached picture:
Answer:
D. 26.
Step-by-step explanation:
We have been given an image of a triangle. We are asked to find the length of CD.
We will use altitude on hypotenuse theorem to solve our given problem.
Upon substituting our given values, we will get:
Therefore, the length of CD is 26 units and option D is the correct choice.
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Answer
a) C
b) B
c) C, E
d) 15.5
e) 0.7
f) 67.7
Step-by-step explanation
a) A linear equation can be written as where
is the slope and
is the intercept on the
-axis. The slope describes how
changes when
changes. A negative value means the it is a decreasing change. In our case,
is
and
is
. Thus, the slope of the equation is
. This means that the area of glacier is decreasing by
every year since 2000.
b) The -intercept (= 16.2
) represents the area covered when
. But
starting from year 2000. This intercept then represents the area covered by glacier in the year 2000. Therefore, the area covered by glacier in 2000 was 16.2
.
c) means the area covered after year 2000. Setting it to 12 means the area covered after
years is 12
).
is therefore the number of years since 2000 that the total area covered will be 12
).
d) to 1 decimal place.
e) The term involving represents the disappearing area. In 12 years, the disappeared area is
to 1 decimal place.
f)
years to 1 decimal place.