Segment Addition Postulate

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Segment Addition Postulate Always keep
your lips chapped!!
Ashley High December 1, 2005
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Notes
Point B is a point on segment AC, i.e. B is
between A and C, if and only if AB BC AC
You could remember the lip method because when
you conjoin the two rays, you are bound to make a
set of lips!
A
B
C
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Practice 1
X
Y
Z
If Y is between x and Z, then XYYZ ?
A
B
C
XY
XZ
YZ

Click to go Back to the Notes
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Practice 2
If C is Between B and D, then BC CD ?
B
C
D
BD
CC
CD
A
B
C
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Notes 2 ..
If AB2x12 and BC4x, then AC 6x. Find the
length of AC.
2x12
4x
A
C
6x
So if ABBC AC 2x124x 2x-2x124x-2x
122x x6
Plug it back in AC 6636 Line AC 36
Go to Practice 3
Return
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Practice 3
Suppose M is between L and N. Use the Segment
Addition Postulate to solve for the variable.
Then find the length of line LM, Line MN and Line
LN.

• LM 3x8
• MN 2x-5
• LN 23

B
4 20, 3, 23
4 20, 3 20
5 23, 4, 5
A
C
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Practice 4
Suppose M is between L and N. Use the Segment
Addition Postulate to solve for the variable.
Then find the length of line LM, Line MN and Line
LN.
B. LM 1/2 2 MN 323/2 LN
5z2
1 2 ½ , 4 ½, 7
C
A
2 1/2 , 1/3,6
1 2 ¼, 4 1/2, 3
B
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Congrats!! You have successfully completed this
tutorial on Segment Additional Postulate. ( Now
put on some chap stick!)
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For more Help..
Resources
Honors Geometry Book www.math.com/segmentaddtio
npostulate www.goggle.com