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a)
P=q²/2, gdzie q to przekątna kwadratu
q=2r, zatem:
P=(2r)²/2=4r²/2=2r²
P=2(10cm)²=200cm²
b)
P=3a²√3 / 2, gdzie a=r
P=3r²√3/2
P=3*(10cm)²√3/2=150√3cm²
c)
P=a²√3 / 4 , gdzie a=r
P=r²√3 / 4
P=(10cm)²√3 / 4 = 25√3 cm²
b) pole- 150 cm kwadratowych.