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98 = 2l x l
98 = 2l²
l² = 98/2 = 49
l = √49 = 7 cm
p = 2 x l
p= 2 x 7 = 14 cm
maka
L = 98 cm²
⇒ p · l = 98
⇒ 2l · l = 98
⇒ 2l² = 98
⇒ l² = 98/2
⇒ l² = 49
⇒ l = √49
⇒ l = 7 cm
jadi, panjang bangun tersebut
p = 2l
= 2(7)
= 14 cm
Thx