Question

Poin lebih banyak!!
tolong nomor 18 dan 19 ya pakek cara, makasii

Answer 1

Verified answer

Nomor 18
∠A + ∠B + ∠C = 180°
75° + 60° + ∠C = 180°
∠C + 135° = 180°
∠C = 45°

Jawaban : C

Nomor 19
Luas ΔABC = 1/2 .AB.AC.sin A
                    = 1/2 .8 cm.10 cm. sin 120°
                    = 1/2 .8 cm.10cm.1/2 √3
                    = 20√3 cm²
Jawaban : C