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```					     Homework 1c1

Finish Example Exercises 1-4
& Mixed Exercises 1 - 4
# 1-7, 9-11, 21 & 22
Drill 1c1 #1
Solve for x:

4 + 2x + 4x = 25
Drill 1c1 #2
Find the perimeter of the
pentagon.
Drill 1c1 #3
Name this figure.

R
A
Homework 1c1

Finish Example Exercises 1-4
& Mixed Exercises 1 - 4
# 1-7, 9-11, 21 & 22
Drill 1c1 #1
Solve for x:
4 + 2x + 4x = 25
CLT    6x + 4 = 25
S4         6x = 21
D6        x = 3.5
Drill 1c1 #2
Find the perimeter of the pentagon.

P = 4.1 + 6.8+ 5.4+ 3.5+ 8.3
= 28.1 in
Drill 1c1 #3
Name this figure.

R
A
RA
Unit: Tools of Geometry
Lesson 1c1: Measuring
Angles & Segments
Objective: The student will
use geometric tools and
postulates to find measures
of segments and angles.

Make sure that you have copied
the objective on Worksheet 1-4
Unit: Tools of Geometry Lesson
1c1: Measuring Angles & Segments
Postulate
If three points A, B, and C are
collinear and B is between
A and C, then AB + BC = AC.
A           B                    C
Make sure that you have copied this in
your “notes” book for Section 1-4.
Ruler Postulate /

Find the length of segment AC.
(AC - the length of AC)
a. AC= -2 - - 5 = 3
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /

Find the length of segment CY.
(CY - the length of CY)
b. CY= 5 - - 2 = 7
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /

Find the length of segment AB.
(AB - the length of AB)
c. AB= 0 - - 5 = 5
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /

Find the length of segment BY.
(BY - the length of BY)
d. BY= 5 - 0 = 5
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /

Find the length of segment XA.
(XA - the length of XA)
e. XA= 2 - - 5 = 7
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /
Find JK if the coordinate of J is -4
and of the coordinate of K is 7 .
(Count the distance from J to K)

h. JK = 7 - - 4 =11
This is like counting steps!
In Geometry a length
is never negative!
Ruler Postulate /
Find ST if the coordinate of S is -1
and of the coordinate of T is -9 .
(Count the distance from S to T)
i. JK = -1 - - 9 = 8
This is like counting steps!
In Geometry a length
is never negative!
Now finish working
problems 5 – 20 & 1-4
Example Exercises 1-4
Why are you still
watching
the screen?
Ruler Postulate /

Find the length of AC + CY.
(ADD - the lengths of AC & CY)
f. AC + CY= (-2+- 7 = +10 -2)=
3 -5) (5-
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /

Find the length of YB + BC.
(ADD - the lengths of YB & BC)
g. YB + BC= 55+ 2 =+ 7 - -2)=
( - 0) (0
This is like counting steps!
In Geometry a length is
never negative!
Ruler Postulate /
Use the diagram below to complete.
A          B              C
If AB= 13 and BC=18, then AC= 31
= 31
13 + 18 then BC= ____
If AB= 21 and AC=51,            30
If AB= x+10, BC= – 21 = 30
51 11 and AC=37, x=___
16
If AB= 2x+4, + 10+x 21= AC=48, x=__
CLT BC=x+8 and=37
S 21 x +11 16 37
x          =             12
S 12 + x+ = = 48
2x3
D         x 8 36
+= =
CLT+ 4 3x 3x12 1248
Ruler Postulate /

F x -2 G         2x + 3 H
If FH = 22 find the value of:
3x+ + 2x +
x = 21
a. x = 3x -2 1 = 22 =37= 22
b. FG =7 - 2 = 5
x-2=
c. GH =14 + 3 = 17
2x + 3 =
Now finish working
problems 21 – 29 on
Example Exercises 1-4
& problems 1 – 7, 9-11,
21 & 22 on
Mixed Exercises 1-4
Why are you still watching
the screen?
CLOSER 1c1 # 1, 2 , & 3

1. Find the length of AC.
2. Find the length of CX.
3. Find the length of AC + CX.
CLOSER 1c1 # 4

Find ST if the coordinate of S is -3
and of the coordinate of T is -8 .
CLOSER 1c1 # 5
F 13   G               H
30
5. If FG= 13 and FH = 30,
find GH:
CLOSER 1c1 # 6, 7 , & 8

F x-4 G          3x + 2 H

If FH = 30 find the value of:
6. x
7. Find the length of FG.
8. Find the length of GH.
Pack up and be ready to leave
when the tone sounds.

DO NOT LEAVE YOUR
SEAT UNTIL THE
TONE!

```
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