Luas lingkaran bila diameter 14 28

Luas lingkaran = πR2

- diket = diameter = 14 : 2 = 7 jari2
πR2
=22/7*7*7
=22*7 = 154

-diket = diameter 28 : 2 = 14 jari2
πR2
=22/7*14*14
=22*2*14
= 616

semoga membantu

14 X 1/2 = 7
22/7X7 =22X7=1078cm²

28X1/2=14
22X14X14=4312cm²