Jawab:
Penjelasan dengan langkah-langkah:
Pd segiempat tali busur, jumlah sudut yg berhadapan = 180°
Maka
Sudut B + Sudut D = 180°
5x + 45° = 180°
5x = 180° - 45°
5x = 135°
x = 135° ÷ 5 = 27°
Sudut A + Sudut C = 180°
y + 3x- 5 = 180°
y + (3× 27°) = 180° + 5
y = 185 - 81 = 104°
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Jawab:
Penjelasan dengan langkah-langkah:
Pd segiempat tali busur, jumlah sudut yg berhadapan = 180°
Maka
Sudut B + Sudut D = 180°
5x + 45° = 180°
5x = 180° - 45°
5x = 135°
x = 135° ÷ 5 = 27°
Sudut A + Sudut C = 180°
y + 3x- 5 = 180°
y + (3× 27°) = 180° + 5
y = 185 - 81 = 104°