Question

Tolong Di Jawab...................​

Answer 1

——1——
—A—
Diketahui :
- Sudut 1 = Sudut 3 = a°
- Sudut 2 = 68°

Ditanya :
- Nilai a = ......?
- <DEG = ......?

Penyelesaian :
- Nilai a :
Sudut 1 + Sudut 2 + Sudut 3 = 180°
a° + 68° + a° = 180°
2a° = 180° - 68°
2a° = 112°
a = 112°/2°
a = 56

- <DEG :
<DEG = Sudut 1 + Sudut 2
<DEG = 56° + 68°
<DEG = 124°

—B—
Diketahui :
- Sudut 1 = (5b + 12)°
- Sudut 2 = b°

Ditanya :
- Nilai b = ......?
- < KLN = ......?

Penyelesaian :
- Nilai b :
Sudut 1 + Sudut 2 = 180°
5b° + 12° + b° = 180°
6b° = 180° - 12°
6b° = 168°
b = 168°/6°
b = 28

- <KLN :
<KLN = (5b + 12)°
<KLN = [5(28) + 12)°
<KLN = (140 + 12)°
<KLN = 152°