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K = 98 cm
panjang = 28 cm
maka :
K = 2 x (p+l)
98 = 2 x (28+l)
98 = 56 + 2l
2l = 98-56
l = 42/2
l = 21 cm
jadi :
L = p x l
= 28 x 21
= 588 cm²
p = 28 cm
K = 2(p + l)
98 = 2(28 + l)
49 = 28 + l
l = 49 - 28
l = 21
L = p × l
= 28 cm × 21 cm
= 588 cm²
Jadi luasnya adalah 588 cm²