Answer:
9.36cm
Step-by-step explanation:
We can add up all the sides to find the perimeter.
[tex]x+2x+2x=5x[/tex]
So the perimeter, 46.8, is equivalent to 5x.
Solve.
[tex]5x=46.8 \\ \\ x=9.36[/tex]
So [tex]x[/tex] is 9.36.
Since the base is [tex]1x[/tex], the base is 9.36cm.
We can plug back in to check our answers.
[tex]2x=18.72\\9.36+18.72+18.72 = 46.8[/tex]
