Question

Which of the following measurements represents the perimeter of the triangle above?

Answer 1

first, we find x and y,

`\begin{gathered} \sin 42=(y)/(18) \\ 18*\sin 42=y \\ y=12.04 \end{gathered}`
`\begin{gathered} \cos 42=(x)/(18) \\ 18*\cos 42=x \\ x=13.37 \end{gathered}`

then the perimeter is

`P=18+x+y=18+12.04+13.37=43.42`

answer:

43.42 units