Berdasarkan gambar tersebut, tentukan nilai x - 2y
a. 15°
b. 21°
c. 36°
d. 51°
SOAL 1
___________________________________________
Cari Nilai x :
2x° + 3° + 75° = 180°
2x° = 180° - 3° - 75°
2x° = 180° - 78°
2x° = 102°
x° = 102° ÷ 2
x° = 51°
___________________________________________ Cari Nilai y :
3y° - 5° + 140° = 180°
3y° = 180° + 5° - 140°
3y° = 180° - 135°
3y° = 45°
y° = 45° ÷ 3
y° = 15°
___________________________________________ x - 2y
= 51° - 2(15°)
= 51° - (2 × 15°)
= 51° - 30°
= 21°
Opsi(B.)
___________________________________________ [tex] {\mathcal\color{purple}{{\pink{\underline{\purple{\underline\bold{\pink{K}\bold\color{violet}{h\bold{\pink{a}\bold\color{violet}{d\bold{\pink{i}\bold\color{violet}{j\bold{\pink{a}\bold\color{violet}{h\bold{\pink{A}\bold\color{violet}{m\bold{\pink{j}\bold\color{violet}{a\bold{\pink{d}\bold\color{violet}{1\bold{\pink{2}}}}}}}}}}}}}}}}}}}}}}[/tex]
240° + 3y - 5° = 180°
135° + 3y = 180°
3y = 180° - 135°
3y = 45°
y = 45°/3
y = 15°
[tex] \: [/tex]
75° + 2x + 3° = 180°
78° + 2x = 180°
2x = 180° - 78°
2x = 102°
x = 102°/2
x = 51°
[tex] \: [/tex]
Maka:
x - 2y
= 51° - 2(15°)
= 51° - 30°
= 21°
[answer.2.content]
