It's super useful to be able to find the distance around stuff. Like when you’re being pursued by authorities while running around the base of an enormous water tower. Trust us—it's gonna happen.

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Perimeter of Irregular Shapes 
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Perimeter and Circumference 
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Perimeter of a Rectangle 
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Attributes of Circles 
Up Next:
Area of a Sector 
Up Next:
Equations of Circles 
Up Next:
The Tangent Function 
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Tangent HalfAngle Formula