b: \(R=113.04:2:3.14=18\left(dm\right)\)
\(S=18\cdot18\cdot3.14=1017,36\left(dm^2\right)\)
c: \(R=0.785:2:3.14=0.125\left(m\right)\)
\(S=0.125^2\cdot3.14=0.0490625\left(m^2\right)\)
b: R=113.04:2:3.14=18(dm)
S=18⋅18⋅3.14=1017,36(dm2)
c: R=0.785:2:3.14=0.125(m)
S=0.1252⋅3.14=0.0490625(m2)