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