P=108см,AB=35,CA=32см,BC=?

In the triangle \(ABC\), given:

• The perimeter \(P = 108\) cm
• Side \(AB = 35\) cm
• Side \(CA = 32\) cm

To find the length of side \(BC\), we can use the formula for the perimeter of a triangle:

\[ P = AB + BC + CA \]

Substituting the known values into the formula:

\[ 108 = 35 + BC + 32 \]

Now, combine the known side lengths:

\[ 108 = 67 + BC \]

Next, isolate \(BC\) by subtracting 67 from both sides:

\[ 108 - 67 = BC \]

\[ BC = 41 \text{ cm} \]

Therefore, the length of side \(BC\) is \(41\) cm.