Teacher Note • When talking about the midpoint, mention
Download
Report
Transcript Teacher Note • When talking about the midpoint, mention
Teacher Note
β’ When talking about the midpoint, mention
that it BISECTS the line segment
Unit 9 Notes
Vocabulary
Coordinate- A point that corresponds to one and only
one number on the ruler.
Distance- The distance between any two points is the
absolute value of the difference of the coordinates.
Congruent Segments- segments that have the same
length. Tick marks used to
show congruence.
Ruler Postulate
Ex.1 Finding the length of a segment.
Find each length.
DC
ππ¬π
π΄π΅ = 20ππ‘
πππ = 9 ππ
ππ β
πΏπ
ππ΄π· = ππ
π
ππΏ + ππ
= 15ππ
N
O
T
A
T
I
O
N
π΄π΅ = 20ππ‘
ππ = πΏπ
ππ + π
π = 12
Segment Addition Postulate
Ex.2 Using the Segment Addition Postulate
B is between A and C, AC = 14, and BC = 11.4.
Find AB.
Practice:
Y is between X and Z, XZ = 3, and
XY =
π
π .
π
Find YZ.
Ex.3 Using the Segment Addition Postulate
AC = 27 Solve for x.
Ex.4 Using the Segment Addition Postulate
S is between R and T. Find RT.
Practice: Find DF.
Ex.5 Using the Segment Addition Postulate
B is the midpoint of π΄πΆ.
AB = 5x and BC= 3x+4.
Find: AB = ________ BC = ________ AC = _______
Practice:
S is the midpoint of π
π, RS = -2x, and ST = -3x β 2.
Find RS, ST, and RT.
Assignment
Blue Workbook:
page 4-6 #4-6, 11-31
page 7 #5-7