tolong di bantu ya tugas mtk nih

Gunakan rumus perbandingan sin segitiga

Cari AB
AB/sin c = AC/sin b
AB/sin 30° = 20/sin 90°
AB = 20/sin 90° × sin 30°
AB = 20/1 × 1/2
AB = 10 cm

Cari BC
BC/sin 60° = AC/sin 90°
BC = 20/sin 90° × sin 60°
BC = 20/1 × 1/2√3
BC = 10√3 cm

Cari luas ABCD
L = p × l
L = AB × BC
L = 10 × 10√3
L = 100√3 cm²