Pliss jawab yg nomor 5
Matematika
Renwin
Pertanyaan
Pliss jawab yg nomor 5
1 Jawaban
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1. Jawaban whongaliem
α + β + γ = 180°
30° + 60° + γ = 180°
90° + γ = 180°
γ = 180° - 90°
γ = 90°
Δ ABC siku siku di C
a/ sin α = c / sin γ
a / sin 30° = c / sin 90°
a / (1/2) = c / 1
a = 1/2 c
a + c = 6
1/2 c + c = 6
3/2 c = 6
c = 6 x 2/3
c = 4
a + c = 6
a + 4 = 6
a = 6 - 4
a = 2
b² = c² - a²
b² = 4² - 2²
b² = 16 - 4
b² = 12
b = √12
b = 2√3 cm ...... jawaban : B