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
Angles that have the same measure are said to be _____________________. If two angles are equal in measure, how do you mark them?
Using your
, construct an angle congruent to !R .
R
Again, using your
,bisect !P .
P Now... construct right angle. (the fish)
Construct a 60Ë&#x161; angle.
Estimate the measure of the following angles:
Determine the value of x... C
m!AOB = 4x " 2 , m!BOC = 5x + 10 and m!COD = 3x " 8
B
D
E
60Ë&#x161;
A O
Assignment: p.28 #s 3, 6-10 all, 12, 14, 16, 17, 21, 22, 23, 25, 26, 29, 33-38 all, 42. Study for Quiz 1 in sections 1.1, 1.2, 1.3, & 1.4. (on Tuesday Sept. 6th.)