math(Please help!!!)
posted by Abbey .
A ladder is leaning against a house and is forming a 60 degree angle with the ground. If the top of the ladder is 18 feet off of the ground, how long is the ladder? Leave your answer in exact form.

i don't know

sin 60 = opposite/hypotenuse
opposite is 18
solve for hypotenuse 
ummm sorry

the answer would be 20.78 but i don't know how to put that in exact form...sorry

Ha you must be grade 8 cause I got it my text book oh in back it says 4 m

i d k

sin 60 degrees. 18/hyp
x.sin 60=0.8660
18.(0.8660)=x
15.588m = x