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= 30 x 15
= 450 m²
K = 2 (p+l)
= 2 (30 + 15)
= 2 x 45
= 90 m
luasnya adalah:300 m
keliling:2×(p+l)=2×(30m+15m)=2×45m=90m
jadi kelilingnya adalah 90 m