Answer:
2
Step-by-step explanation:
Remark
You are going to set up a proportion. The sides used are opposite the chosen angles.
Givens
x is opposite an angle marked by 2 arcs.
5 is opposite an angle marked with 1 arc.
8 is opposite an angle marked with 2 arcs
20 is opposite an angle marked with 1 arc.
Equation
x/5 = 8/20 Cross Multiply
20x = 5*8
20x = 40
x = 40/20
x = 2
