t trapesium = 15 - 7 = 8 cm
= s × s + (a + b) × t ÷ 2
= 7 × 7 + (7 + 12) × 8 ÷ 2
= 49 + 19 × 8 ÷ 2
= 49 + 76 cm²
= 125 cm² (C.)
Jawab:
125 cm²
Penjelasan dengan langkah-langkah:
Luas persegi = 7 x 7 = 49 cm²
Luas trapersium siku2 = (7+12)/2 x (15-7) = 76 cm²
Luas total = 125 cm²
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t trapesium = 15 - 7 = 8 cm
= s × s + (a + b) × t ÷ 2
= 7 × 7 + (7 + 12) × 8 ÷ 2
= 49 + 19 × 8 ÷ 2
= 49 + 76 cm²
= 125 cm² (C.)
Jawab:
125 cm²
Penjelasan dengan langkah-langkah:
Luas persegi = 7 x 7 = 49 cm²
Luas trapersium siku2 = (7+12)/2 x (15-7) = 76 cm²
Luas total = 125 cm²