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Geometry Warm Up
10-6 CIRCLES AND ARCSObjective: To find the circumference and arc length.
Circumference• Circumference: the distance around the circle• Pi: ratio of the circumference of a circle to it’s diameter
pi• The number pi is irrational
Coplanar circles• Concentric circles: coplanar circles that have the same
center.
Problem 1
Try with a partner
Arc Length
Problem 2• What is the length of each arc shown in red? • Leave your answer in terms of
Problem 3• What is the length of a semicircle with radius 1.3 m? leave
your answer in terms of .
TOO
Homework• Pg. 654 # 24 – 36, 52 – 54