| Wzór | P = ab : 2 | V = 1 : 3PpH | P = ((a + b)h) : 2 | S = (a
|
| Wyznaczana wielkość | b | H | a | t |
| Przekształcony wzór | (2P) : a = b | 3V : Pp = H | (2P - bh) : h = a | t = 
|
2P = ab
2P = (a + b)h
2P = ah + bh
2P - bh = ah
2S = a
2Sa = 
t = 