SEE PICTURE BELOW Which ratios of side lengths are equal to tan (a)? ("a" should be the Greek letter "alpha")
x/y
y/z
y/x
q/r
r/q
r/s
q/s

Your car's gasoline tank holds 18 gallons of gasoline. on a trip in canada, the tank is one-quarter full. you want to fill the tank. how many liters of gasoline are needed to fill the tank