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Medians of Triangles
供稿人: Andrews
(原作者: Dilaura)
5.3
What is the intersection point of 
the three medians of a triangle
called?
circumcenter
Incenter
median
centroid
5.2
The perpendicular bisectors of the
three sides of a triangle intersect
to form which point of concurrency?
midpoint
Incenter
Circumcenter
Circumference
5.3
A line that goes from the vertex of an
angle to the midpoint of the opposite
side of a triangle is called?
circumcenter
Incenter
median
centroid
5.3
D is the intersection
point of two medians

If AG = 15 find AD and DG
AD =
DG =
A
E
D
C
G
B
5.3
DB =
DE =
D is the intersection
point of two medians

Find the following
lengths in the triangle
AC =
CE =
A
F
4
7
E
D
9
C
G
B
5.3
Given that B is the
centroid of ∆JHK

Which of the following
is true?
HB = ⅔ HD
CB = ½ KB
BE = ⅓ JE
All of the above
5.4
Find the coordinates of the midpoint of AB.
If A = (-4,9) and B = (8,-1)
midpoint =
Give your answer as a
coordinate with NO spaces
ex. (-3,7)
5.3
D is the centroid of
the triangle ABC

If CD = 18 find DE and CE
DE =
CE =
A
E
D
C
G
B
5.3
D is the centroid ofthe triangle ABC

If DE = 2 find CD and CE
CD =
CE =
A
E
D
C
G
B
D is the centroid

What is the ratio of the 
lengths of the two parts (AD:DG) of segment AG?
5.3
3:1
1:3
2:1
2:3
A
E
D
C
G
B
5.4
Find the coordinates of the midpoint of AB.
If A = (2,10) and B = (4,-4)
midpoint =
Give your answer as a
coordinate with NO spaces
ex. (-3,7)
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