Question

Find the perimeter of a triangle $ABC$ whose sides are $5cm$, $7cm$, and $xcm$

Answer 1

Here, we have to find the perimeter of a triangle $ABC$

We know that perimeter of triangle = sum of sides = $(a+b+c)$ cm (if $a,b,$ and $c$are sides of the triangle)

now it is given that,

$$\begin{gathered} a=5cm \\ b=7cm \\ c=xcm \end{gathered}$$

So, the Perimeter of the triangle = $(5+7+x)cm$

i.e- Perimeter of triangle = $(12+x)cm$

Hence, the Perimeter of the triangle is $(12+x)cm$