# Construction of triangle

I don't know how to prove or disprove the following problem: How to construct triangle if elements $a$, $b$, $\beta-\gamma$ are given? Is it constructible (if not, how to prove it)? Any help is welcome.

-
What are $\beta$ and $\gamma$? – hjpotter92 May 30 '13 at 21:32
Angles at points B and C of triangle ABC – alans May 30 '13 at 22:20
Can you edit your question to explain more clearly what you mean by constructible. Do you mean with straightedge and compass? – Sammy Black May 30 '13 at 22:32
Yes, with straightedge and compass. – alans May 30 '13 at 22:34

with $a,\angle B,C$ you can construct a triangle.but the extra b may cause conflict unless you ignore it. or you can use $a,b , \angle C$ to construct a triangle.but you have to omit $\angle B$.