Download 2.4-Vertical_Angles

2.4 Vertical Angles
Goal:
Find the measures of angles
formed by intersecting lines.
Key Words

Vertical angles
– Two angles that are nonadjacent
and their sides are formed by two
intersecting lines.

Linear pair
– Two adjacent angles
whose non-common sides
are on the same line.
Identify Vertical Angles
and Linear Pairs
1. Determine whether the labeled angles
are vertical angles, a linear pair or
neither.
Linear Pair
Neither
Vertical Angles
Postulate 7
Linear Pair Postulate
If two angles form a linear pair, then
they are supplementary.
1
2
m1  m2  180
0
Use the Linear Pair
Postulate
2. Find the measure of RSU
Theorem 2.3
Vertical Angles Theorem
Vertical angles are congruent
2
3
1
4
1  m3
2  m4
Use the Vertical Angles
Theorem
3. Find the measure of CED
Find Angle Measures
4. Find m1, m2, m3
Use Angles with Vertical
Angles
5. Find the value of y
Homework
2.4 pg. 78
10-40 Even, 41-50, 52-56 Even