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= 2(15+8)
= 46 cm
luas = p×l
=15×8
=120 cm²
b. kel = 2(p+l)
=2(10+5)
= 30cm
luas = p × l
= 10 × 5
= 50 cm²
semoga membantu ^^
p × l
15cm × 8cm = 120cm2
Rumus keliling persegi panjang =
2 × ( p + l )
2 × ( 15 + 8 )
2 × 23cm =
46cm
B. 10 cm × 5 cm = 50 cm2 = luas
2 × ( 10 + 5) = 30cm = keliling