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Bellwork. If Nick earns commission on his sales in the following way: 4 % on his first $15,000 and 7% on anything over $15,000. What would his sales commission be if his actual sales were $42,000?. Daily Activities. Timed Skill Drill. Homework Review. Pre-Algebra. obj. 7.3.f. - PowerPoint PPT PresentationTRANSCRIPT
Bellwork If Nick earns commission on his sales in
the following way: 4 % on his first $15,000and 7% on anything over $15,000. What would his sales commission be if his actual sales were $42,000?
Daily Activities
Timed Skill Drill
Homework Review
Pre-Algebra
The Angel of Angles
obj. 7.3.f
Angle Facts Angles form when two rays meet at a common endpoint. The meeting point of two rays is called the vertex.
Angles are named either by one letter assigned to the vertex (∠G) or three letters with the vertex in the center and the other two letters denoting the rays (∠RGH).
Angles are measured in units called degrees.
G
R
H(Vertex)
(Ray)
(Ray)
Angles are classified by size.
Right angles Straight angles Acute angles Obtuse angles
Right Angles Angles that measure exactly 90º
Straight Angle An angle that measures exactly 180º
Acute Angles
Angles that measure less than 90º
Obtuse Angles Angles that measure more that 90º
Acute, Obtuse, Right, Straight
Can you identify the angle?
Acute, Obtuse, Right, Straight
Can you identify the angle?
Acute, Obtuse, Right, Straight
Can you identify the angle?
Acute, Obtuse, Right, Straight
Can you identify the angle?
Acute, Obtuse, Right, Straight
Can you find all the angle types?
Other Classifications?
Complem
entarySupplem
entary
Two angles whose sum is
Two angles whose sum is
90
180
TIP:Complementary = Corner
TIP:Supplementary = Straight Line
MEASURING ANGLES
Protractors have two sets of numbers going in opposite directions.
Be careful which one you use.
Think: Should the angle I am measuring be larger than 90 or smaller?
Let’s Try!Exam
ple 1Exam
ple 2
Y N T
B
106_____
m BNTm BNY
B
TG
Z49_____
m ZTGm BTZ
EXAMPLE 3
This is an obtuse angles. We know that obtuse angles are greater than . Which scale should we use to measure “G” . Small or large? What is the measure of “G”?
90
YOU
TRY!!!Exam
ple 1Exam
ple 2
S E Z
N148_____
m ZENm SEN
G
S
X
U29_____
m UGXm SGU
YOU TRY EXAMPLE 3…
…
Find = _______
W
m W
ClosureWrite the 4 classifications
of angles (& the 2 sub-classifications)and how to tell the
difference between them.