tolong jawab no 5 sampai 7
Matematika
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Pertanyaan
tolong jawab no 5 sampai 7
1 Jawaban
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1. Jawaban Milieth
5)
∠PQR+∠QRP+∠RPQ=180°
1x+2x+2x=180°
5x=180°
x=180°/5
x=36°
∠QRS+∠QRP+∠TRS=180°
∠QRS=180°-2x+1x
∠QRS=180°-3x
∠QRS=180°-3(36°)
∠QRS=180°-108°
∠QRS=72°
6)
y-x=2/12×180°
=30°
7)
∠ABC+∠BCD=180°
70°+70°+∠ACD=180°
140°+∠ACD=180°
∠ACD=180°-140°
∠ACD=40°