Oblicz pole i obwód koła, którego promień jesr równy: a) 1cm b)Trzy/czwarte metra c)2,2dm

a) 1cm P=4pir^2= 4pi1=4pi cm ^2 l=2pir=2pi cm b) 3/4 m P=4pir^2=4 pi9/16=9/4 pi m^2 l=2pir=3/2 pi m c)2,2dm P=4pir^2=19,36pi dm^2 l=2pir=4,4 pi dm

a. r = 1 cm l= 2πr l = 2π P = πr² P = π*1² p = π b. 3/4 m = 75 cm r = 75cm l = 2πr l = 2π * 75 l = 150π P = πr² P = π*75² P = 5625π c. 2,2dm = 22 cm l = 2πr l = 2π * 22 l = 44π P = πr² P = π * 22² P = 484π

a) P=πr² P=π*1² P=π cm² l=2πr l=2*π*1 l=2π cm b)P=π*(3/4)² P=9/16π m² l=2*π*3/4 l=1,5π m c)P=π*2,2² P=4,84π dm² l=2*π*2,2 l=4,4π dm