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a=5cm
d= a√2
d=5√2
P= a*d= 5*5√2=25√2cm²
b) (zielone)
P= (d*a)/2= (5√2*5)/2= 12,5√5 cm²
c) (niebieskie)
d/2=h=2,5√2cm
P=(d*h)/2 = 25/2=12,5cm²