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sudut siku2 = 90'
sudut tumpul = > 90'
sudut lancip = < 90'
sudut berpelurus = 180'
refleks = lawan sudut (B)
2. C. 0° < a < 90°
3. Pelurus 150°
= 180° - 150°
= 30°
Jawaban: A
4. Sudut refleksi dari sudut P
= 360° - 65°
= 295°
Jawaban: D