Respuesta :
Answer:
l = [tex]\frac{A-2\pi r}{\pi r}[/tex]
Step-by-step explanation:
Given
A = 2πr + πrl ( isolate the term in l by subtracting 2πr from both sides )
A - 2πr = πrl ( divide both sides by πr )
[tex]\frac{A-2\pi r}{\pi r}[/tex] = l
Answer: l = A/πr - 2
Step-by-step explanation:
The given equation is
A = 2πr + πrl
The first step is to subtract 2πr from the left hand side and the right hand side of the equation. It becomes
A - 2πr = 2πr + πrl - 2πr
A - 2πr = πrl
The next step is to divide the left hand side and the right hand side of the equation by πr. It becomes
(A - 2πr)/πr = πrl/πr
l = (A - 2πr)/πr
I = A/πr - 2πr/πr
I = A/πr - 2
