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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. ARC. A. B. ANGLE. D. C. ARC. 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
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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. AB
CD
1
93°
113°
Ex. 2 Find mQT. NQ
TM
92o84o
Ex 3: Find x.40o
120o
xo
Vertex is outside the circle
A
B
C
D
ANGLE = (Large ARC Small ARC)2
ANGLE
LARGE ARC
small
ARC
ANGLELARGE
ARC
small ARC sm
all ARCLARGE
ARC
ANGL
E
A
B
D
1
Ex. 4 Find m1.
65°
15°
A
B
Ex. 5 Find mAB.
27°
70°
1
Ex. 6 Find m1.26
0°
