ANSWERS TO HOMEWORK

2) x = 130, y = 120, z = 110

4) x = 70, y = 110, z = 110

6) x = y = z = 90

8) x = 80, y = 40, z = 60

9-6 OTHER ANGLES

Answer to Warm Up

2.

3.

4.

m BAD m CDA

1 1,

2 2m BAD mBD m CDA mAC

1 1

2 2mBD mAC

OLD ANGLES

1

A

B2

D

C

E

F3

Angle with Chord and Tangent

Inscribed AngleCentral Angle

1m mAB 12

2m mCD

132

m mEF

NEW ANGLES

A

1

D

CB

F

EH

G

2

112

m mAB mCD

Two Chords

Angle inside = Add

Secants and Tangents

12

2m mEF mGH

Angle outside = Subtract

EXAMPLE: CIRCLE O

8A7

6

54

321O

G

F

E

D

CB

62.5

90

35

62.5

117.5

27.5

100 80

125

80

25

30

100

TRY ON OWN In Textbook

Page 358 #1-9 Classroom Exercises

Answers1) 352) 403) 137.54) 805) 456) 407) 508) 1309) 122

HOMEWORK

Page 359 #1-21