Year 2 warm up copy the pictures

1. Name this angle 3 ways

2. If EB bisects <AEC and EC bisects <AED and m< AEB = 25o then

C

A T

2a. Find the m < BEC

2b. Find the m < CED

2c. Find the m < BED

A

B

C

D

E

, ,CAT A TAC

25

25

50

25°

50°

75°

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

obtuse angle

35° 0 90x

150°

90 180x

1.3 continued are angles formed by

two intersecting lines. They share a common vertex but not a common side. Vertical angles are congruent.

1 23

4

Vertical angles

1 2

3 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.

12 1 2 180

linear pair

3

4

5

6

3, 4

4, 5

5, 6

6, 3

These are linear pairs

1.3 continued

A pair of has a sum of 90°.

A pair of has a sum of 180°.

1

220° 70°

A

B

1 2 90

90A B

34

3 4 180

180C D

30° 150°

C

D

complementary angles

supplementary angles

1.3 continued

are lines in the same plane that never meet.

3

34

4

Parallel lines have the same slope

Parallel lines

1.3 continued

are lines that cross and form a 90° angle. Perpendicular lines have opposite and reciprocal slopes.

Perpendicular lines

3

5m

5

3m

1l

2l1 2l l

You can also write:

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. 51 1-8, 11-20, 26