Zad. 4
a)
6cm × x = 72cm² /÷6cm
x = 72cm² ÷ 6cm
x = 12cm
b)
8cm × y = 72cm² /÷8cm
y = 72cm² ÷ 8cm
y = 9cm
c)
18cm × z = 72cm² /÷18cm
z = 72cm² ÷ 18cm
z = 4cm
Zad.5
[tex] \sqrt{64cm {}^{2} } = 8cm[/tex]
Zad.6
28cm ÷ 4 = 7cm
7cm × 7cm = 49cm²
