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Chapter 5.3 Practice
供稿人: Rees
(原作者: Pappal)
There are several different special lines for triangles
There are several different special lines for triangles
midsegment
There are several different special lines for triangles
midsegment
altitude
There are several different special lines for triangles
midsegment
altitude
median
There are several different special lines for triangles
midsegment
altitude
perpendicular bisector
median
There are several different special lines for triangles
midsegment
altitude
perpendicular bisector
median
angle bisector
There are several different special lines for triangles
Each of these has its own defintion
midsegment
altitude
perpendicular bisector
median
angle bisector
A midsegment of a triangle
A midsegment of a triangle
A
B
C
Begins at the midpoint of a side
A midsegment of a triangle
A
B
C
midpoint
Begins at the midpoint of a side
A midsegment of a triangle
A
B
C
Begins at the midpoint of a side
and goes to the midpoint
A midsegment of a triangle
of another side
A
B
C
Begins at the midpoint of a side
and goes to the midpoint
A midsegment of a triangle
of another side
A
B
C
midpoint
Begins at the midpoint of a side
and goes to the midpoint
A midsegment of a triangle
of another side
A
B
C
Begins at the midpoint of a side
and goes to the midpoint
A midsegment of a triangle
of another side
A
midsegment
B
C
If DE is a midsegment
then AD ≅ ?

EC

BE

DB

BC

A
D
B
E
C
An altitude of a triangle
A
B
C
An altitude of a triangle
starts at a vertex
A
B
C
An altitude of a triangle
starts at a vertex
A
vertex
B
C
and is perpendicular
to the opposite side
An altitude of a triangle
starts at a vertex
A
B
C
and is perpendicular
to the opposite side
An altitude of a triangle
starts at a vertex
A
B
C
and is perpendicular
to the opposite side
An altitude of a triangle
starts at a vertex
A
B
C
altitude
BD is perpendicular to...

AC

BC

AB

DB

A
D
B
C
A median of a triangle
A
B
C
starts at the vertex
A median of a triangle
A
vertex
B
C
starts at the vertex
A median of a triangle
and goes to the midpoint
of the opposite side
A
B
C
starts at the vertex
A median of a triangle
and goes to the midpoint
of the opposite side
A
midpoint
B
C
starts at the vertex
A median of a triangle
and goes to the midpoint
of the opposite side
A
B
C
starts at the vertex
A median of a triangle
and goes to the midpoint
of the opposite side
A
B
C
median

BC

AB

AD

AC

If BD is a median
then DC ≅ ?
A
D
B
C
A perpendicular bisector
A
B
C
A perpendicular bisector
start at the midpoint
of a side
A
midpoint
B
C
A perpendicular bisector
and is perpendicular
start at the midpoint
to that side
of a side
A
B
C
A perpendicular bisector
and is perpendicular
start at the midpoint
to that side
of a side
A
B
C
A perpendicular bisector
and is perpendicular
start at the midpoint
to that side
of a side
A
B
perpendicular
C
bisector
median
?
altitude
?
perpendicular bisector
?
midsegment
?
An angle bisector
A
B
C
An angle bisector
starts at a vertex
A
B
C
An angle bisector
starts at a vertex
A
vertex
B
C
An angle bisector
starts at a vertex
and bisects the angle
A
B
C
An angle bisector
starts at a vertex
and bisects the angle
A
B
C
An angle bisector
starts at a vertex
and bisects the angle
A
B
angle bisector
C
altitude
midsegment
median
perpendicular bisector
angle bisector
Fill in the missing information
midpoint
?
vertex
vertex
?
midpoint
vertex
Starts
opposite side
?
midpoint
midpoint
Ends
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