oblicz pole koła opisanego na kwadracie o boku 3 cm (gimnazjum)
R = 0,5d
R = 0,5a√2
R = 0,5*3cm*√2
R = 1,5√2 cm
P = π*1,5√2cm*1,5√2cm
P = 4,5π cm²
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R = 0,5d
R = 0,5a√2
R = 0,5*3cm*√2
R = 1,5√2 cm
P = π*1,5√2cm*1,5√2cm
P = 4,5π cm²