Answer:
The length of BC is 17 units
Step-by-step explanation:
we know that
An isosceles triangle has two equal sides and two equal angles
In this problem we have an isosceles triangle
Because
m∠ACB=m∠ABC ----> given problem
so
AC=AB
substitute the given values
[tex]x+9=2x-8[/tex]
solve for x
[tex]2x-x=9+8[/tex]
[tex]x=17[/tex]
therefore
The length of BC is 17 units
