#3**+2 **

Note that we know the side opposite the 20° angle

And we're looking for the adjacent side, x

The trig function that relates the opposite and adjacent is the tangent

So

tangent (angle measure) = opp / adj

tangent (20° ) = 9 / x .....multiply both sides by x

x * tan (20) = 9 .....divide both sides by tan (20)

x = 9 / tan (20) = 24.72

CPhill Feb 12, 2018

#4**0 **

Ohhh I see thank you so much! How do i make you best answer? Or is that not possible..

RainbowPanda
Feb 12, 2018

#6**+1 **

I think you can just hit "best answer" under my question......I don't often give myself the "best answer" because I'm never sure if someone else might not explain it better...

CPhill Feb 12, 2018