Answer:
x = 55.6
Step-by-step explanation:
In this triangle, the hypotenuse is the unknownj. The sine function relates the hypotenuse, the angle and the side opposite the angle:
sin Ф = opp / hyp
Here, sin 20° = 19 / x. This can be rearranged as x = 19 / sin 20°
This works out to x = 19 / 0.342, or 55.6.
x = 55.6
