a) 50cm = dπ /π 50cm ÷ π= d d= 15,92
lub
2r = D/π = 50/3,14 = 15,92 cm
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a) 50cm = dπ /π 50cm ÷ π= d d= 15,92
lub
2r = D/π = 50/3,14 = 15,92 cm