A square of 16 cm square was cut into three pieces:
R a right triangle with sides of 20 cm, 16 cm and 12 cm;
B a right triangle with sides of 16 cm, 12.8 cm and 9.6 cm;
V a quadrilateral with two right angles.
How many different convex polygons (ie, the corners of which are all smaller than 180 degrees) can be form?
Calculate their perimeter.
