1. Year 2 warm up copy the pictures
Name this angle 3 ways
If EB bisects <AEC and EC bisects <AED and m< AEB = 25o then T A A
2a. Find the m < BEC
2b. Find the m < CED
2c. Find the m < BED
25° 25 B
50° 25 E C
75° 50 D

2. 1.3 Angle Relationships A is an angle that measures 90°.
An measures less than 90°.
An measures more than 90° but less than 180°.
right angle
acute angle
35°
obtuse angle
150°

3. 1.3 continued
are angles formed by two intersecting lines. They share a common vertex but not a common side. Vertical angles are congruent.
Vertical angles 3 1 2 4

4. 1.3 continued
Two angles are a if they share a vertex and a common side, and their non-common sides form a line.
linear pair 2 1
These are linear pairs 6 3 5 4

5. 1.3 continued A pair of has a sum of 90°. complementary anglesB
20°
70° 2 1 A
supplementary angles C
30°
150° 4 3 D

6. 1.3 continued are lines in the same plane that never meet.
Parallel lines 3 3 4 4
Parallel lines have the same slope

7. 1.3 continued Perpendicular lines
are lines that cross and form a 90° angle. Perpendicular lines have opposite and reciprocal slopes.
Perpendicular lines
You can
also write: l

8. 1.3 Summary
Write down in complete sentences and in your own words 3 things that you learned today.
Class work: worksheet 1.3
Homework: p , 11-20, 26