ΔAED = 180°
90°+10°+20°+30°+β=180°
150°+β=180° /-150°
β=30°
ΔAEC = 180°
90°+10°+20°+α=180°
120°+α=180° /-120°
α=60°
Odp. Kąt α jest dwa razy większy od kąta β.
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ΔAED = 180°
90°+10°+20°+30°+β=180°
150°+β=180° /-150°
β=30°
ΔAEC = 180°
90°+10°+20°+α=180°
120°+α=180° /-120°
α=60°
Odp. Kąt α jest dwa razy większy od kąta β.