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4,8 cm * 2 = 9,6 cm
P = (10 cm * 9,6 cm) : 2 = 96 cm(2) : 2 = 48 cm(2)
P=48cm²
a=10cm
h=?
48cm²=½*10cm*h
48cm²=5cm*h
5h=48cm²/:5
h=9,6cm
spr
P=½a*h
48cm²=½*10cm*9,6cm
48cm²=5cm*9,6cm
48cm²=48cm²
odp.wysokość opuszczona na to ramię wynosi 9,6cm