Download 1.4.1 Measure and Classify Angles

1.4.1 Measure and Classify Angles
 Angle
– is two rays, called sides, with a common
endpoint, called a vertex

Angles are always called by 3 letters (except when
alone), two are points on the rays, the third, listed in
the middle, is the vertex
Vertex
ABC
CBA
B
A
B
Sides
C
 For
any angle:
Q
Acute:
0 < mQ< 90
T
Obtuse:
90 < mQ< 180
Z
Right:
mZ = 90
N
Straight Angle:
mN = 180
 Two
angles are congruent if they have equal
measures, we draw it like this:
T  F
mT = mF
T
 Angle
F
Bisector - A ray that divides an angle
into two angles that are congruent
(2x + 10)⁰
Find the value of x
(4x – 3)⁰
 pp.
28 – 32

 1,
2 – 14 even, 19 -23 odd, 27, 31, 35 -41
odd, 45, 49, 69