A. 108°
Diketahui
- Sudut <AOC = (8x - 20)°
- Sudut <BOC = (4x + 8)°
Ditanya
Besar pelurush <BOC
Dijawab
<AOC + <BOC = 180° (berpelurus)
(8x - 20)° + (4x + 8)° = 180°
(8x + 4x)° + (-20 + 8)° = 180°
12x + (-12)° = 180°
12x = 180 - (-12)°
12x = 180 + 12
12x = 192°
x = 192 ÷ 12
x = 16
= 8x - 20
= 8(16) - 20
= 128 - 20
= 108°
= 4x + 8
= 4(16) + 8
= 64 + 8
= 72°
▶ Kesimpulan :
Mapel: Matematika
Kelas: VII
Materi: Bab 3 - Garis dan Sudut
Kode Kategorisasi: 7.2.3
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A. 108°
PEMBAHASAN
Diketahui
- Sudut <AOC = (8x - 20)°
- Sudut <BOC = (4x + 8)°
Ditanya
Besar pelurush <BOC
Dijawab
<AOC + <BOC = 180° (berpelurus)
(8x - 20)° + (4x + 8)° = 180°
(8x + 4x)° + (-20 + 8)° = 180°
12x + (-12)° = 180°
12x = 180 - (-12)°
12x = 180 + 12
12x = 192°
x = 192 ÷ 12
x = 16
= 8x - 20
= 8(16) - 20
= 128 - 20
= 108°
= 4x + 8
= 4(16) + 8
= 64 + 8
= 72°
▶ Kesimpulan :
DETAIL JAWABAN
Mapel: Matematika
Kelas: VII
Materi: Bab 3 - Garis dan Sudut
Kode Kategorisasi: 7.2.3