4.
Figure 1
Quantity A
Quantity B
PS
SR
A. Quantity A is greater.
B. Quantity B is greater.
C. The two quantities are equal.
D. The relationship cannot be determined from the information given.
Explanation
From Figure 1, you know that
PQR
is a triangle and
that point
S
is between points
P
and
R
,
so
and
You are also given that
However, this
information is not
sufficient to compare
PS
and
SR
. Furthermore, because the figure is not
necessarily drawn
to scale, you cannot determine the relative sizes of
PS
and
SR
visually from the figure,
though they may appear to be equal. The position of
S
can vary along
PR
anywhere
between
P
and
R
. Following are two possible variations of Figure 1, each
of which is drawn
to be consistent with the information
Figure 2
Figure 3
16
Note that Quantity A is greater in Figure 2 and Quantity B is greater in Figure 3.
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