A = b · h / 2
P = a + b + c
A = V¯p·(p-a)·(p-b)·(p-c)
A = a ²
P = 4 · a
A = l · a
P = 2 · ( l + a )
A = b · h
A = D · d / 2
P = 2 · V¯(D² + d²)
A = ( B + b ) · h / 2
A = P · a / 2
P = 6 · l
A = A + B + C
A = pi · r ²
L = 2 · pi · r
A = pi · D · d / 4
