Penjelasan dengan langkah-langkah:
BANGUN DATAR
1. Jajar Genjang
Luas = 32 × 21
Keliling = 2 × (32 + 25)
Keliling = 2 × 57
2. Trapesium sama kaki
Luas = 12 + 30 × 12
2
Luas = 42 × 12
Luas = 21 × 12
Keliling = 2 × 15 + 12 + 30
Keliling = 30 + 42
L = alas × tinggi
L = 32 × 21
L = 672 cm²
2 ( A + B )
2 ( 32 + 25 )
2 ( 57 )
114 cm
L = ½ × ( a + b ) × t
L = ½ × ( 12 + 30 ) × 12
L = 12/2 × 42
L = 6 × 42
L = 252 cm²
2 × 15 cm + 30 cm + 12 cm
30 cm + 30 cm + 12 cm
60 cm + 12 cm
72 cm
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Penjelasan dengan langkah-langkah:
BANGUN DATAR
1. Jajar Genjang
Luas = 32 × 21
Luas = 672 cm²
Keliling = 2 × (32 + 25)
Keliling = 2 × 57
Keliling = 114 cm
2. Trapesium sama kaki
Luas = 12 + 30 × 12
2
Luas = 42 × 12
2
Luas = 21 × 12
Luas = 252 cm²
Keliling = 2 × 15 + 12 + 30
Keliling = 30 + 42
Keliling = 72 cm
L = alas × tinggi
L = 32 × 21
L = 672 cm²
2 ( A + B )
2 ( 32 + 25 )
2 ( 57 )
114 cm
______________________
L = ½ × ( a + b ) × t
L = ½ × ( 12 + 30 ) × 12
L = 12/2 × 42
L = 6 × 42
L = 252 cm²
2 × 15 cm + 30 cm + 12 cm
30 cm + 30 cm + 12 cm
60 cm + 12 cm
72 cm