Wzory skróconego mnożenia
(a + b)2 = a2 + 2ab + b2
(a - b)2 = a2 - 2ab + b2
a2 - b2 = (a - b)(a + b)
(a + b)3 = a3 + 3a2b + 3ab2 + b3
(a - b)3 = a3 - 3a2b + 3ab2 - b3
a3 + b3 = (a + b)(a2 - ab + b2)
a3 - b3 = (a - b)(a2 + ab + b2)
Trójkąt
Ob = a + b + c
P=1/2 ah
Twierdzenie Pitagorasa
a2 + b2 = c2
Trapez
Ob = a + b + c + d
P=1/2 (a+b)h
P=1/2 d1*d2*sinγ
Romb
Ob = 4a
P = a · h = a2 · sinα
P=1/2 d1*d2
Prostokąt
Ob = 2a + 2b
P = a · b
Kwadrat
Ob = 4a
P = a2
P=12d
Deltoid
Ob = 2a + 2b
P=1/2 d1*d2*
P=a*b*sinα