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2014anglesday1.notebook
September 11, 2014
Geometry Chapter 1
Chapter 1 Day 6
OBJ: to name, classify, and measure angles. (
Naming angles: 4 ways
O
1
COW
WOC
How many
Name them
no-no's
)
C
O
's do you see?
W
1
W
Z
WXY
WXZ
ZXY
Chapter1 day6
X
Y
2014anglesday1.notebook
Chapter1 day6
September 11, 2014
2014anglesday1.notebook
September 11, 2014
What if
m WXZ = 70o and
W
Z
m ZXY is 40o
X
What do you think m WXY would be?
Chapter1 day6
Y
2014anglesday1.notebook
September 11, 2014
There are 4 types of angles we will be talking about:
Straight, obtuse, right, and acute.
Straight angle: angle whose measure is 180o
Obtuse angle: an angle whose measure is between
90o and 180o
Right angle: an angle whose measure is 90o
Acute angle: an angle whose measure is between 0o and 90o
Chapter1 day6
2014anglesday1.notebook
September 11, 2014
There are 4 types of angles we will be talking about:
Straight, obtuse, right, and acute.
Straight angle: angle whose measure is 180o
Obtuse angle: an angle whose measure is between
90o and 180o
Right angle: an angle whose measure is 90o
Acute angle: an angle whose measure is between 0o and 90o
90o
90o
180o
Right angle
Acute angle
180o
Straight angle
Obtuse angle
179o
36o
40o
109o
100o
31o
132o
91o
109o
30o
17o
5o o
60
179o
1
89o
o
45
o
30o
141o
o o
67138
67
Chapter1 day6
o
179o
2014anglesday1.notebook
September 11, 2014
To measure angles:
28
50
64
123
Chapter1 day6
2014anglesday1.notebook
September 11, 2014
130
Chapter1 day6
90
2014anglesday1.notebook
September 11, 2014
OBJ: To use the Angle Addition Postulate
GIVEN: pt B is in the interior of CAT then
m CAB + m BAT = m CAT
C
B
A
T
GIVEN: pt C is in the interior of AJL
Draw figure and write the angle addition postulate.
m
Chapter1 day6
+m
=m
2014anglesday1.notebook
B
September 11, 2014
C
T
m
A
+m
W
=m
Y
X
m
Chapter1 day6
+m
Z
=m
2014anglesday1.notebook
Given:
m CAB = 62o
m BAT = 53o
September 11, 2014
C
B
Find:
m CAT
A
Label fig and write formula first!
m
Chapter1 day6
+m
=m
T
2014anglesday1.notebook
September 11, 2014
GIVEN: m JAS = 140o, find m SAY
Given: JY
S
J
A
HW pp 29-33 (16-28all, 48, 67-69)
no fig for 24-26, measure and classify
Chapter1 day6
Y
Figs for
20­23, 27, 28, 48, 70
2014anglesday1.notebook
Chapter1 day6
September 11, 2014
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