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R = 8 cm
r = 10 cm
dit : Perbandingan Luas ?
maka :
L1 : L2
π x r1² : π x r2² (π dicoret)
8² : 10²
64 : 100 .....(dibagi 4)
16 : 25
πxrxr : π x r x r
(π mya dicoret aja)
kan jadinya
=r xr : r x r
=8 x 8 : 10 x 10
=64 : 100
= 16 : 25
Semoga bermanfaat ^_^