Question

Question 1

Answer 1

You can draw vertical line, and get 2 rectangles. 
1) First one with sides 2 and 7.
2) Second one with sides 1 and (5-2) = 3,  1 and 3.

3) Area of the first one =2*7=14 units²
4)Area of the second one = 1*3=3 units²

5) Area of the whole polygon = 14+3=17 units²

Answer C. 17units².