Answer=6 pieces
First lets convert 3/4 to ?/8...

3/4 is equivalent to 6/8.
Now we can divide 6/8 by 1/8

Answer=6 pieces
121/2 = 720/p
720*2= 121p
1440=121p
divide by 121
=12%
The answer would be 137 degrees because of supplementary angles of x and 43 degrees. Then the angle opposite of x (z) is the same as x.
The pentagon is the one with 5 sides. Good Luck!