Matematika Sekolah Menengah Pertama 5. Hitunglah luas persegi Panjang jika keliling = 50 cm dan lebar = 10 cm!kk tolong dibantu kk​

eloyyundtulv – May 12, 2023

5. Hitunglah luas persegi Panjang jika keliling = 50 cm dan lebar = 10 cm!

kk tolong dibantu kk​

[tex] \\ [/tex]

K = 2(p + l)

50 = 2(p + 10)

50/2 = P + 10

25 = p + 10

p = 25 - 10

p = 15 cm

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L = p × L

L = 15 × 10

L = 150 cm²

[tex] \\ [/tex]

Ninmy!

K = 2p + 2l

50 cm = 2p + 2(10) cm

50 cm = 2p + 20 cm

50 cm - 20 cm = 2p

2p = 30 cm

p = 15 cm

Luas

L = p × l

L = 15 cm × 10 cm

L = 150 cm²

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