Solution
= Solution
For a geodesic triangle on the unit sphere with angles $\alpha,\beta,\gamma$, the <Gauss-Bonnet theorem> gives
$$
\boxed{\operatorname{area}=\alpha+\beta+\gamma-\pi.}
$$
= Solution
For a geodesic triangle on the unit sphere with angles $\alpha,\beta,\gamma$, the <Gauss-Bonnet theorem> gives
$$
\boxed{\operatorname{area}=\alpha+\beta+\gamma-\pi.}
$$