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Mapel : MatematikaBab : Sudut
Diketahui :
- Sudut PQR = (4x + 18)°
- Sudut PQS = (2x)°
Ditanya :
- Sudut PQR = ......?
Penyelesaian :
- Nilai x :
Sudut PQR + Sudut PQS = 180°
(4x + 18)° + (2x)° = 180°
4x° + 18° + 2x° = 180°
4x° + 2x° = 180° - 18°
6x° = 162°
x = 162°/6°
x = 27
- Sudut PQR :
Sudut PQR = (4x + 18)°
Sudut PQR = (4(27) + 18)°
Sudut PQR = (108 + 18)°
Sudut PQR = 126°
Jawaban : B. 126°
Maaf Kalau Salah