Hollow Rectangle
Side, a: Side, b: 

mm mm 
Area, A:  mm^{2}  
Perimeter, P:  mm  
Centroid, C_{x}:  mm  
Centroid, C_{y}:  mm  
Second Moment of Area, I_{x}:  mm^{4}  
Second Moment of Area, I_{y}:  mm^{4}  
Second Moment of Area, I_{x1}:  mm^{4}  
Second Moment of Area, I_{y1}:  mm^{4}  
Polar Moment of Inertia, J_{z}:  mm^{4}  
Polar Moment of Inertia, J_{z1}:  mm^{4}  
Radius of Gyration, K_{x}:  mm  
Radius of Gyration, K_{y}:  mm  
Radius of Gyration, K_{z}:  mm  
Radius of Gyration, K_{x1}:  mm  
Radius of Gyration, K_{y1}:  mm  
Radius of Gyration, K_{z1}:  mm  
Plastic Section Modulus, S_{x}:  mm^{3}  
Plastic Section Modulus, S_{y}:  mm^{3}  
Elastic Section Modulus, Z_{x}:  mm^{3}  
Elastic Section Modulus, Z_{y}:  mm^{3}  
Torsional Constant, J:  mm^{4}  