Besar sudut abd adalah
Jawaban Terkonfirmasi
1. Cari nilai a.
(4a+30°)+2a = 180°
6a+30° = 180°
6a = 150°
a = 25°
2. Cari sudut ABD.
# jika A di kanan
ABD = 2a
= 2(25°)
= 50°
# jika A di kiri
ABD = 4a+30°
= 4(25°)+30°
= 100°+30°
= 130°
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DETAIL JAWABAN
Mapel: Matematika
Kelas: 7
Materi: Garis dan Sudut
2a + 4a + 30° = 180°
6a = 180° – 30°
6a = 150°
a = 25
<ABD = 2a
<ABD = 2(25)
<ABD = 50° (D) ✓