Number of Notches  Number of Pieces  Total Area  Constructions  

Twosided Pieces  k  10Ck  4*(10Ck)  
1  10  40  4x10 and 5x8 rectangle, some symmetric figures  
2  45  180  No rectangles, because 180 isn't a multiple of 8 

3  120  480  10x48, 12x40, 15x32, 16x30, 18x20 rectangles, 23²7² square ring 

Onesided Pieces  k  2*(10Ck)  8*(10Ck)  
1  20  80  4x20, 5x16, 9x10 rectangles, 9²1 square ring, some symmetric figures 

2  90  360  8x40, 9x40, 10x36 rectangles, 19²1² square ring  
3  240  960  10x96, 12x80, 15x64, 16x60, 20x48, 24x40, 30x32 rectangles, 32²8² square ring 