yo yang bisa jawab tolong pake caranya ya
Penjelasan dengan langkah-langkah:
nomor 11:
menentukan nilai x
2x + 3x + 4x = 180°
9x = 180°
x = 180° ÷ 9
x = 20°
nilai x + 15°
= 20° + 15°
= 35°
opsi c. 35°
___________
nomor 12:
menentukan nilai x
4x° + (6x - 20)° = 180°
4x + 6x - 20° = 180°
10x - 20° = 180°
10x = 180° + 20°
10x = 200°
x = 200/10
x = 20°
maka besar sudut <GFH
<GFH = 6x - 20°
<GFH = 6(20)° - 20°
<GFH = 120° - 20°
<GFH = 100°
opsi b. 100°
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