Tamanho da fôrma em relação as fatias de bolo

RETANGULAR: 

35X25cm = 48 fatias 
40x30cm= 65 fatias
45x30cm= 74fatias
50x40cm=110fatias
55x45cm=136 fatias
75x45cm= 180 fatias

OVAL:
30x20cm= 25fatias
40x30cm=50fatias
50x40cm=85fatias
55x45cm=110fatias
60x50cm=130fatias
65x55cm=155fatias

CORAÇÃO:
15cm=14fatias
20cm=22fatias
25cm=38fatias
30cm=56fatias
35cm=72fatias
40cm=94fatias

REDONDA:
15cm=12fatias
20cm=24fatias
25cm=38fatias
30cm=56fatias
35cm=78fatias
40cm=100fatias