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h=½a
pole=ah
8=a×½a
a²=16
a=4= bok rombu
h=½a=½ z 4=2= wysokosć rombu
wysokość - x
bok - 2x
2x*x = 8
2x^ = 8 |:2
x^ = 4
x = √4
x = 2
wysokość - 2
bok - 2*2 = 4