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a-bok rombu
h-wysokość rombu
P=36√2
sin45=h/a
√2/2=h/a
a√2=2h
a=2h/√2
a=h√2
P=ah
P=h√2*h
36√2=h²√2
36=h²
h=6
a=P/h
a=36√2/6
a=6√2
Bok rombu wynosi 6√2.
a - bok rombu
h - wysokość = 6
h/a = sin45°
h/a = √2/2
√2a = 2h
a = 2h / √2 = √2h = 6√2
P = ah
P = 6√2 × 6
P = 36√2 cm²