Species Diameter Radius Basal Area inches Diameter/2 PI* r2 Plot 1 (1/10 acre) sample tree 1 10.0 5 78.53750000000001 sample tree 2 4.0 2 12.566 sample tree 3 8.0 4 50.264 sample tree 4 6.0 3 28.273500000000002 sample tree 5 20.0 10 314.15000000000003 sample tree 6 12.0 6 113.09400000000001