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diket.
S = 1:200.000
JP panjang = 9 cm
JP lebar = 7 cm
ditanya.
JS luas dan keliling?
jawab.
Js = Jp x s
Js = 9 x 200.000
Js = 1.800.000 cm = 18 km (panjang)
Js = Jp x s
Js = 7 x 200.000
Js = 1.400.000 cm = 14 km (lebar)
luas = panjang x lebar
luas = 18 x 14 = 252 km²
keliling = panjang + panjang + lebar + lebar
keliling = 18 + 18 + 14 +14
keliling = 64 km
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semoga membantu, jika kurang jelas jangan sungkan untuk bertanya :)