Zadanie 1
a = 200cm = 2m
b= 50 dm = 5m
H = 30m
P_c=2ab + 2aH + 2bH
P_c=2*2*5+2*2*30+2*5*30=20+120+300=440[m^2]=4,4a
odpowiedź B
1a=100m^2
Zadanie 2
V=a^3=(1,5)^3=3,375[cm^3]
3,375*9=30,375\approx30[g] odpowiedź C
Zadanie 3
tg\alpha=\frac{a}{d}
tg\alpha=\frac{a}{a\sqrt2}=\frac{1}{\sqrt2}
tg\alpha=\frac{\sqrt2}{\sqrt2*\sqrt2}
tg\alpha=\frac{\sqrt2}{2}\approx0,71
\alpha\approx35^o
odpowiedź D