6.
Enter the equations in the Y
5
list and graph in
the decimal viewing window.
KEYSTROKES:
1
6
2
3
1
6
51
2
6
2
4
Use the CALC menu to find the points of
intersection.
Find the intersection of
a
and
t
.
KEYSTROKES:
[CALC] 5
Lines
a
and
t
intersect at (
2
0.2, 0.7).
Find the intersection of
b
and
t
.
KEYSTROKES:
[CALC] 5
Lines
b
and
t
intersect at (
2
0.3, 0.5).
Perpendiculars and Distance
Page 162
Check for Understanding
1.
Construct a perpendicular line between them.
2.
Sample answer: You are hiking and need to find
the shortest path to a shelter.
3.
Sample answer: Measure distances at different
parts; compare slopes; measure angles. Finding
slopes is the most readily available method.
4.
5.
6.
1.
Graph line
,
and point
A
.Place the compass
point at point
A
.Make the setting wide enough
so that when an arc is drawn, it intersects
,
in
two places. Label these points
X
and
Y
.
2.
Put the compass at point
X
and draw an arc
above line
,
.
4.
Draw
AZ
@
#$
.
AZ
@
'
,
.The segment constructed
from point
A
(2,
2
6) perpendicular to line
,
appears to intersect line
,
at (
2
2,
2
4). Use the
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 Fall '10
 Dr.Zhan
 Calculus, PreCalculus, Equations, Distance, enter, decimal viewing window

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