engineering fundamentals Area and Perimeter of a Regular Polygon
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Area Perimeter
 
Use the Polar Moment of Inertia Equation for a triangle about the
(x1, y1) axies where:

Multiply this moment of inertia by n. This is the Polar Moment of Inertia of a Regular n sided Polygon about the Centroidal Axis.

Triangle
Moment of Inertia
Triangle
Geometric Properties
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