11). A circle has a diameter of 4 cm. What is the circumference ?Use

_____________		 12). A circle has a radius of 3 m. What is its circumference?

______________
13). A regular octagon has sides of 3 cm. What is its perimeter?

_____________		 14). What is the perimeter of a four sided figure whose sides are 2 in, 3 in, 4 in, and 3 in.? Draw a picture of it and labael the sides.

______________

15). [Extra credit] We are making a checkerboard on a piece of paper. It is to be 8 squares by 8 squares. If each little square is to be 1 inch on each side, what is the total length of the lines on the paper?

Answer: _________________

16). [Extra credit] A cube has each edge 5 cm long. What is the sum of the length of all its edges?

Answer: _________________

17). [Extra credit] A pyramid has a square base with edges 4 inches long and equilateral triangles to form the top. What is the length of all the edges together? Draw a picture.

Answer: _________________