Posted by Esi on .
1. Triangle ABC has a 63.0degree angle at B, and side AC is 13.6 cm long. What is the diameter of the circle circumscribed about ABC?
2. And: Given any triangle ABC, with sides a, b, and c opposite angles A, B,
and C, respectively, what can be said about the three ratios a/sinA , b/sinB
, and c/sinC ? This result is known as the Law of Sines.

geometry 
drwls,
1. Side AC is also known as b, the side opposite angle B. Use the law of sines. The ratio b/sinB = 2R, where R is the radius of the circumscribed circle.
For a proof, see http://www.pballew.net/lawofsin.html
2. Those ratios are equal for any triangle. 
geometry 
Esi,
thank you