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2π = 360°
Korzystam z proporcji
a) 20° = (1/9)π
2π = 360°
x = 20°
x = ( 2π*20°) : 360°
x = (1/9)π
b) 75° = (5/12)π
c) 110° = (11/18)π
d) 210°= (7/6)π
e) 235°= (47/36)π
f) 1120° = (56/9)π
2.Zamień podane kąty na miarę stopniową :
Korzystam z proporcji:
π = 180°
8/9π = x
x = (8/9π*180°) : π
x = 160°
a) 8/9 π = 160°
b) 5/12 π = 75°
c) 2 1/3 π = 7/3π = 420°