Răspuns:
Explicație pas cu pas:
a)∡APB=(AB)/2=180°/2=90° unghi drept
b)∡PAB=(AB)/2=180°/2=90° unghi drept
c)∡PBA=∡AOP/2=20°/2=10°
∡QBA=2∡PBA=20°
∡QAB=90°-∡QBA=90°-20°=70°
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Răspuns:
Explicație pas cu pas:
a)∡APB=(AB)/2=180°/2=90° unghi drept
b)∡PAB=(AB)/2=180°/2=90° unghi drept
c)∡PBA=∡AOP/2=20°/2=10°
∡QBA=2∡PBA=20°
∡QAB=90°-∡QBA=90°-20°=70°