Question

7 cmThe perimeter is26.2Therefore themissing side is:I+

Answer 1

Perimeter is the sum of all sides of a shape

then if we sum all sides of the triangle we have 26

we write this like a equation making the missing measure x

`7+7+x+x=26`

simplify

`14+2x=26`

and find x subtracting 14 on both sides

`\begin{gathered} 14-14+2x=26-14 \\ 2x=12 \end{gathered}`

and dividing by 2 to solve x

`\begin{gathered} (2x)/(2)=(12)/(2) \\ \\ x=6 \end{gathered}`

the value of the missing side is 6

we can check finding the perimeter again

`\begin{gathered} 7+7+6+6 \\ 14+12 \\ =26 \end{gathered}`

perimeter is right then the values of the side is right too