Answer:
1. 10.92
2. 26.98
3. 1.98
4. 3.61
Explanation:
(Going left to right)
To find the area you have to multiply L x W, so for the first rectangle you do 2.8 x 3.9, which is 10.92
For the second one you do 7.1 x 3.8, which is 26.98
then you have to do 2.2 x .9, which is 1.98
and for the last one, because it's a square you simply have to do 1.9 x 1.9 which is 3.61