# Radian measure and arc length

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##### Examples
###### Lessons
1. Use the information in each diagram to determine the value of the variable
Give your answers to the nearest hundredth of a unit.

2. A 20 cm long pendulum swings through an arc length of 60 cm. Through
what angle, in both degrees and radians, does the pendulum swing?
###### Topic Notes
$arc\;length= r \cdot \theta\;radian$