Respuesta :

There are all parallelograms.
To find their area we need to use only one formula.
A=base*height
Everything is given, so
1) A=b*h=5.3*4=21.2 km²
2) A=b*h= 11*10.7= 117.7 mi²
3)  A=b*h= 10.5*7.9 =82.95 mi²