P. 20 Classroom Ex.

A

C

D

B

E7

65

4

32

1

Name the vertex and the side of each angle.

1 4

, ,C CD CBor CA������������������������������������������

P. 20 Classroom Ex.

A

C

D

B

E7

65

4

32

1

Name the vertex and the side of each angle.

1 4

, ,C CD CBor CA������������������������������������������

2 1

, ,A ABor AC ADor AE��������������������������������������������������������

P. 20 Classroom Ex.

A

C

D

B

E7

65

4

32

1

Name the vertex and the side of each angle.

3 6

, ,D DC DB����������������������������

A

C

D

B

E7

65

4

32

1

7 1Acute 400

Almost half way to 90

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

A

C

D

B

E7

65

4

32

1

7 1Acute 400

Almost half way to 90

8 2Right 900

0

0

0

2 3 180

3 90

2 90

m m

m

m

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

A

C

D

B

E7

65

4

32

1

9 EDBObtuse 1350

90 + half 90

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

A

C

D

B

E7

65

4

32

1

9 EDBObtuse 1350

90 + half 90

10 CBD

Right 900

Box indicates 900

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

A

C

D

B

E7

65

4

32

1

11 ADCObtuse 1100

90 + half 20

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

A

C

D

B

E7

65

4

32

1

State whether the angle appears to be acute, right, obtuse or straight. Then estimate the angle.

11 ADCObtuse 1100

90 + half 20

12 ADE

Straight 1800

A

C

D

B

E7

65

4

32

1

Complete

13 7 6 _____m m m EDB

A

C

D

B

E7

65

4

32

1

Complete

13 7 6 _____m m m

14 6 5 _____m m m

EDB

CDA

A

C

D

B

E7

65

4

32

1

Complete

13 7 6 _____m m m

14 6 5 _____m m m

15 2 3 _____m m

EDBEDB

CDA

1800

A

C

D

B

E7

65

4

32

1

Complete

13 7 6 _____m m m

14 6 5 _____m m m

15 2 3 _____m m

16 sec

_____ ____

If DBbi ts CDA

then

��������������

EDBEDB

CDA

1800

6 5

OH A

C

G

F

B90

State the measure of each angle.

17 BOC

18 GOH

19 FOG

90 20 70

180 160 20

160 120 40

OH A

C

G

F

B90

State the measure of each angle.

20 COF

21 GOB

22 HOA

120 90 30

160 20 140

180

OH A

C

G

F

B90

23 Name 4 angles adjacent to .FOG

HOG COF FOB FOA

OH A

C

G

F

B90

24 What ray bisects two angles?

sec .OCbi ts HOA and GOB ��������������

OH A

C

G

F

B90

25 Name a pair of congruent angles that are…

AcuteRight

Obtuse

&HOG BOA

&COG COB

&COH COA

&BOH GOA

Q26 Study the corner of the room where two walls and the ceiling meet.

How many right angles do you see?

Q27 Draw an angle AOB on a piece of paper. Fold the paper so that ray OA falls on ray OB. Lay the paper flat and call the fold line OK.

?Howdoes AB relate to AOB�������������� �

3

It is an angle bisector.

50A B

F

O

C

DE

Given the diagram, state whether you can reach the conclusion shown.

28 50m FOB

29 90m AOC

30 180m DOC

31 AO AB

Yes, Given

No, not given 900

Yes, Given straight line.

No, not given =

50A B

F

O

C

DE

32 AOC BOC

33 130m AOF

34. Points E, O, and F are collinear.

Yes, 180 – 50 = 130

No, not given 900

Yes, Given

50A B

F

O

C

DE

35. Point C is in the interior of AOF

36 .AOE and AODareadjacent s

37 .AOBis a straight

38 .OAand OBareopposite rays����������������������������

Yes, Given

50A B

F

O

C

DE

35. Point C is in the interior of AOF

36 .AOE and AODareadjacent s

37 .AOBis a straight

38 .OAand OBareopposite rays����������������������������

Yes, Given

No the first angle is inside the second.

50A B

F

O

C

DE

35. Point C is in the interior of AOF

36 .AOE and AODareadjacent s

37 .AOBis a straight

38 .OAand OBareopposite rays����������������������������

Yes, Given

No the first angle is inside the second.

Yes, Given

Yes, They share the same end point and are on the same line.

C’est fini.

Good day and good luck.