Area of rectangle = base × height
Area of parallelogram = base × height
1.
[tex]\displaystyle 2.25 \times 1.5=3.375 \ or \ 3\frac{3}{8} \ ft^2[/tex]
2.
[tex]7 \times 5.2 = 36.4 \ cm^2[/tex]
3.
[tex]8.1 \times 3.5=28.35 \ in^2[/tex]
4.
[tex]11 \times 4.2=46.2 \ in^2[/tex]
The measurement that is unnecessary is 11.7 inches because only base and height is required to find the area.
