Question 936607
<pre>

That's not enough information, as you can easily see from these two cases of 
two isosceles triangles inscribed in two different circle both with legs 8 cm. long, drawn below.

You can easily see that the larger circle on the left has a different
radius than the smaller circle on the right.

If you will give the missing information in the thank-you note form below,
I'll get back to you.
 
{{{drawing(891,8019/16,-7,9,-6,3,

circle(-3,-5/4,13/4), circle(5,-1/6,13/6),

triangle(0,0,-6,0,-3,2), triangle(3,-1,5,2,7,-1)  )}}}

Edwin</pre>