Geom10.6.notebook
April 21, 2014
Geometry
Ch.10 Notes Page 44
P44 10­6 Circles and Arcs Apr 12­6:29 AM
Circle Terminology
A radius is a segment that has one endpoint at the center and the other endpoint on the circle. A diameter is a segment that contains the center of a circle and has endpoints on the circle.
A central angle is an angle whose vertex is the center of the circle.
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Geom10.6.notebook
April 21, 2014
Example
The graph the to right shows how 3600 people spend their time in a 24­hour period.
1) What is the total number of degrees in a circle? _____________
2) 18% spend their time on Entertainment. How many degrees is 18%? ____________
3) Sleep? ________ 4) Food? _________
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Geom10.6.notebook
April 21, 2014
two major arcs
two minor arcs
two semicircles
a pair of adjacent arcs
an acute central angle
an obtuse central angle
D
F
E
A
C
B
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Finding Angle Measures
45
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Geom10.6.notebook
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Circumference is the Distance around a Circle
wheel
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Notes Continued on Next Page...
Please put your name and class period at the top of
the homework. Also include the homework number.
Terms:
Circle, Center, Radius, Congruent Circles,
Diameter, Central Angle, Semicircle, Minor Arc,
Major Arc, Adjacent Arcs, Circumference, Pi,
Concentric Circles, Arc Length, Congruent Arcs
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