Angles in and out of the circle
13
description
Angles in and out of the circle. O OUT. IN. What we know so far. Central angle = arc Angle ON the circle = ½ arc. Vertex is inside the circle. A. ARC. B. ANGLE. D. ARC. C. Looks like a PLUS sign!. Ex. 1 Find m 1. 93 °. A. B. 1. D. C. 113 °. Ex. 2 Find m QT. N. Q. - PowerPoint PPT Presentation
Transcript of Angles in and out of the circle
Angles in and out of the circle
• OOUT
IN
What we know so far
• Central angle = arc
• Angle ON the circle = ½ arc
Vertex is inside the circleA
B
CD
ANGLE = (ARC + ARC)
2
ANGLE
ARC
ARC
Ex. 1 Find m1.A
B
CD
1
93°
113°
Ex. 2 Find mQT.N
Q
TM
92º84º
Ex 3: Find x.40o
120o
xo
Challenge:
110º
100º
55º
wº
xº
yºzº
Vertex is outside the circle
A
B
C
D
ANGLE = (Large ARC Small ARC)
2
ANGLE
LA
RGE
AR
C
small
ARC
ANGLELA
RG
E
AR
C
sm
all A
RC
small A
RC
LARGE
ARC
AN
GL
E
Negative (-) temperatures outside…
A
B
D
1
Ex. 5 Find m1.
65°
15°
A
B
Ex. 6 Find mAB.
27°
70°
1
Ex. 7 Find m1.26
0°
