You can
put this solution on YOUR website!
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.
Edwin