Section 2 Typles of Angles.notebook
Unit 4
Types of Angles
February 19, 2014
Section 2 Typles of Angles.notebook
February 19, 2014
Types of Angles
Angles
Name
Measure
acute angle
greater than 0 and less than 90
right angle
equal to 90
obtuse angle
straight angle
greater than 90
and less than 180
equal to 180
Identify each angle as acute, obtuse, right or straight.
a) 70 degrees
b) 90 degrees
c) 175 degrees
Section 2 Typles of Angles.notebook
Angle Measurements
Complementary ­ Supplementary ­
February 19, 2014
Section 2 Typles of Angles.notebook
February 19, 2014
Tell whether the two angles with the given measurement are complementary, supplementary
or neither.
65o , 35o
44o , 46o
122o , 58o
Section 2 Typles of Angles.notebook
February 19, 2014
Find the measure of the angle that is complementary to the given angle.
o
15
64o
35o
Section 2 Typles of Angles.notebook
February 19, 2014
Find the measure of the angle that is supplementary to the given angle.
o
123
o
87
75o
Section 2 Typles of Angles.notebook
February 19, 2014
Adjacent angles
What are they?
36
o
125o
Section 2 Typles of Angles.notebook
February 19, 2014
Vertical Angles
What are they?
30o
110o
Congruent ­ Give the measure of each angle.
4
1
2
3 = 28
Section 2 Typles of Angles.notebook
February 19, 2014
Find the value of x in each figure.
1.)
2.) 5x ­ 3
3x + 5
6x + 3
4x + 7
Section 2 Typles of Angles.notebook
February 19, 2014
Challenge
o
You know that <B is the complement of <A, that m<B = 51 , o
and that m<A = (3x ­ 12) . Find x.
Section 2 Typles of Angles.notebook
February 19, 2014
Error Analysis
Z
o
A student measured <XYZ and said that m<XYZ = 120 . Explain the students error.
.
Y
.
.
X