Penjelasan dengan langkah-langkah:
1)
a = 180° - 110° = 70°
a + 60° = 70° + 60° = 130°
b = 180° - (a + 60) = 180° - (70° + 60°) = 50°
2)
persegi panjang I = 7 x 5 = 35 cm²
persegi panjang II = 3 x 15 = 45 cm²
luas total = 35 + 45 = 80 cm²
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Penjelasan dengan langkah-langkah:
1)
a = 180° - 110° = 70°
a + 60° = 70° + 60° = 130°
b = 180° - (a + 60) = 180° - (70° + 60°) = 50°
2)
persegi panjang I = 7 x 5 = 35 cm²
persegi panjang II = 3 x 15 = 45 cm²
luas total = 35 + 45 = 80 cm²