16. Terletak dikuadran berapa sudut 89⁰! a. Kuadran I b. Kuadran II c. Kuadran III d. Kuadran IV e. Kuadran V
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Penjelasan dengan langkah-langkah:
Kuadran 1 = 0° - 90°
Kuadran 2 = 90° - 180°
Kuadran 3 = 180° - 270°
Kuadran 4 = 270° - 360°
Sehingga sudut 89° berada di kuadran 1 (A)