Penjelasan dengan langkah-langkah:
9) a
d1 = 10 cm, d2 = 15 cm
Luas = d1 × d2
2
Luas = 10 × 15
Luas = 150
Luas = 75 cm²
10) d
s1 = 5 cm
s2 = 8 cm +
s1 + s2 = 13 cm
Keliling = 2 × (s1 + s2)
Keliling = 2 × 13
Keliling = 26 cm
1) s = 48 cm
Keliling = 4 × s
Keliling = 4 × 48
Keliling = 192 cm
2) Keliling = 120 cm
s = Keliling
4
s = 120
s = 30 cm
Luas = s²
Luas = 30²
Luas = 900 cm²
3) s = 56 cm
Keliling = 4 × 56
Keliling = 224 cm
Luas = 56²
Luas = 3.136 cm²
4) s = 50 m
s.jalan = 1 m
Luas jalan = (50 + 1)² – 50²
Luas jalan = 51² – 50²
Luas jalan = 51 + 50
Luas jalan = 101 m²
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Penjelasan dengan langkah-langkah:
9) a
d1 = 10 cm, d2 = 15 cm
Luas = d1 × d2
2
Luas = 10 × 15
2
Luas = 150
2
Luas = 75 cm²
10) d
s1 = 5 cm
s2 = 8 cm +
s1 + s2 = 13 cm
Keliling = 2 × (s1 + s2)
Keliling = 2 × 13
Keliling = 26 cm
1) s = 48 cm
Keliling = 4 × s
Keliling = 4 × 48
Keliling = 192 cm
2) Keliling = 120 cm
s = Keliling
4
s = 120
4
s = 30 cm
Luas = s²
Luas = 30²
Luas = 900 cm²
3) s = 56 cm
Keliling = 4 × s
Keliling = 4 × 56
Keliling = 224 cm
Luas = s²
Luas = 56²
Luas = 3.136 cm²
4) s = 50 m
s.jalan = 1 m
Luas jalan = (50 + 1)² – 50²
Luas jalan = 51² – 50²
Luas jalan = 51 + 50
Luas jalan = 101 m²