Penjelasan dengan langkah-langkah:
1.)
L = 1/2 × d1 × d2
L = 1/2 × 8 × 12
L = 4 × 12
L = 48 cm²
2.)
L = 1/2 × 9 × 16
L = 9 × 8
L = 72 cm²
3.)
L = 1/2 × 15 × 18
L = 15 × 9
L = 135 cm²
4.)
L = 1/2 × 13 × 21
L = 273/2
L = 136,5 cm²
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Penjelasan dengan langkah-langkah:
1.)
L = 1/2 × d1 × d2
L = 1/2 × 8 × 12
L = 4 × 12
L = 48 cm²
2.)
L = 1/2 × d1 × d2
L = 1/2 × 9 × 16
L = 9 × 8
L = 72 cm²
3.)
L = 1/2 × d1 × d2
L = 1/2 × 15 × 18
L = 15 × 9
L = 135 cm²
4.)
L = 1/2 × d1 × d2
L = 1/2 × 13 × 21
L = 273/2
L = 136,5 cm²