Page 14 - TB_5B
P. 14
Objective: Identify parallel lines, and measure corresponding,
vertical, and alternate angles
different measure(s) different measure(s)
Chat
Discuss the positions of angles that have the same measure.
When 2 lines intersect, 4 angles are formed. a
Angles that are across from each other, such as d cb
a and c, and b and d, are called vertical angles.
a 180 b c 180 b
So a and c are congruent.
The same method can be used to prove that b and d are congruent.
17. Congruent Angles 3
vertical, and alternate angles
different measure(s) different measure(s)
Chat
Discuss the positions of angles that have the same measure.
When 2 lines intersect, 4 angles are formed. a
Angles that are across from each other, such as d cb
a and c, and b and d, are called vertical angles.
a 180 b c 180 b
So a and c are congruent.
The same method can be used to prove that b and d are congruent.
17. Congruent Angles 3
