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a=24:4=6
p=a*a
p=6*6=36cm²
p(prostokąta)=36cm² -16cm² =20 cm²
a*b=20cm²
6*b=20 /:6
b=3,3333....
boki mają 6cm i 3,33....
a=6
a²=36
c*b=36-16
c*b=20
2b+2c=24
b+c=12
c=12-b
(12-b)*b=20
-b²+12b-20=0
√Δ = 8
b1 = (-12-8)/-2 =10 c=2
b2= (-12+8)/-2= 2 c =10
Prostokąt ma wymiary 10 i 2