4). (4 points each) Find the area of the shaded part of this figure:

5). (4 points) Find the area and perimeter of this figure:

6). (3 points each) Fill in the missing dimensions:
(Hint: these are divide problems!)
a).
b).
7). (5 points) [Extra Credit]
Emily's mother wanted to put new tile in her kitchen, but didn't know how much tile to buy. Can you help her find how many square feet of tile she needs? Tile covers the shaded area (this is the floor).