Answer:
2) 22in.squared 3) 28in.squared 4) 17 1/2in. squared or 35/2in. squared
Explanation:
The one picture is of the formula you use to solve it. See in the case of problem 2.) ,
For number 3) ,
Plug these values into the formula A=1/2 × h (a+b)
Always do a+b first (since they are in parenthesis) and then multiply that by h and 1/2.
Here is the process in the other picture.
It is quite simple once you practice more! The third picture is for you to do and see if you get the same answer I did.
I hope you found what you needed!