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3768:3=1256
Maaf kalo salah
t=12cm
dit?:Lp
jwb:
s=r²+t²
=√12+√5²
=144+25
=√169 = 13
Lp= Πr(r+s)
=3,14×5(5+13)
=15,7×18
=282,6 cm²