Chapter 1 - Essentials of Geometry Section 1.4 - Measure and classify angles What the student should get from this: 1. Name and classify angles 2. Measure and construct angles and angle bisectors What始s an angle?
A B
1
Name the angle -
(interior)
(exterior) C
How many angles do you see?
Classify angles: Acute" "
"
Right"
"
Obtuse""
"
"
Straight
x
0 < x < 90
x = 180 x = 90
90 < x < 180