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- Sudut 1 = 38°
- Sudut 2 = x
- Sudut 3 = y
- Sudut 4 = z
- Sudut 1 = Sudut 2
- Sudut 3 = Sudut 4
Ditanya :
- Nilai x = ......?
- Nilai y = ......?
- Nilai z = ......?
Penyelesaian :
- Nilai x :
Sudut 1 = Sudut 2
38° = x
x = 38°
- Nilai y :
Sudut 2 + Sudut 3 + Sudut 4 = 180°
x + y + z = 180°
38° + y + y = 180°
2y = 180° - 38°
2y = 142°
y = 142°/2
y = 71°
- Nilai z :
Sudut 3 = Sudut 4
y = z
z = 71°