Trawnik:

a=5m

b=5m+1m+4m-7m-1m=2m

h=5m

$P=\frac{\left(5+2\right)\cdot 5}{2}=17,5c{m}^2$ $P=\frac{\left(5+2\right)\cdot 5}{2}=17,5c{m}^2$

rośliny ozdobne:

a=7m

b=4m

h=5m

$P=\frac{\left(7+4\right)\cdot 5}{2}=27,5c{m}^2$