Persegi Panjang
keliling = (p+l) × 2
luas = p × l
mencari lebar = 1/2 × (keliling - panjang × 2)
Jawab
Lebar =
1/2 × (90 - 25 × 2) = 1/2 × (90 - 50)
= 1/2 × 40
= 20cm
Luas =
25 × 20 = 500cm²
Penjelasan dengan langkah-langkah:
k=2.(p+l)
90=2.(25+l)
90/2=25+l
45=25+l
45-25=20
lebar=20cm
Luas=p×l
L=25×20
L=500cm²
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Persegi Panjang
keliling = (p+l) × 2
luas = p × l
mencari lebar = 1/2 × (keliling - panjang × 2)
Jawab
Lebar =
1/2 × (90 - 25 × 2) = 1/2 × (90 - 50)
= 1/2 × 40
= 20cm
Luas =
25 × 20 = 500cm²
Penjelasan dengan langkah-langkah:
k=2.(p+l)
90=2.(25+l)
90/2=25+l
45=25+l
45-25=20
lebar=20cm
Luas=p×l
L=25×20
L=500cm²
SEMOGA MEMBANTU