angles. 1)name and classify angles. 2) define complementary and supplementary angles. 3) apply...
TRANSCRIPT
1) Name and classify angles.
2) Define complementary and supplementary angles.
3) Apply definitions of complementary and supplementary angles.
Objectives
An angle has two sides than meet a the vertex. In the angle below the sides are and These two sides intersect a the vertex of the angle which is point R.
Possible Names for this angle:
1R
SRT TRS
The measure of an angle is usually given in degrees (later in the year we will learn that you can also measure angles in radians) . A protractor is the tool used to measure angles in degrees.
I Do: Example 2A
Find the measure of each angle. Then classify each as acute, right, or obtuse.
A. WXV
B. YXZ
C. ZXW
D. YXW
We do: Example 2D
Congruent angles are angles that have the same measure. Arc marks are used to show that the two angles are congruent.
Complementary Angles (Definition)
To be complementary the sum of the two angles must equal 90 degrees.
Supplementary Angles (Definition)
To be supplementary the sum of the two angles must equal 180 degrees.
The angles in example 1 are also called a linear pair.
Example 1
Example 2
Link to Gizmos