Oblicz średnicę pnia drzewa , którego obwód wynosi : a) 50 cm b) 1m c) 4m

d=[latex]frac{l}{pi}[/latex]   a) d [latex]approx [/latex] [latex]frac{50cm}{3,14}[/latex] [latex]approx [/latex] 16cm b) d [latex]approx [/latex] [latex]frac{1m}{3,14}[/latex] [latex]approx [/latex] 0,3m c) d [latex]approx [/latex] [latex]frac{4m}{3,14}[/latex] [latex]approx [/latex] 1,3m

Obw: 2πr 50=2πr r= 25/π srednica 50/π   1=2πr r=1/2π srednica π   4=2πr r= 4/2π r= 2π srednica 4π