A2. In trapezoid $A B C D$, the length of side $A D$ is $13 \mathrm{~cm}$ and the length of side $B C$ is $9 \mathrm{~cm}$. Angle $\angle B A D$ measures $37^{\circ}$. What is the measure of angle $\angle B C D$, rounded to two decimal places, if angle $\angle C B A$ is acute?
(A) $37^{\circ}$
(B) $143^{\circ}$
(C) $48.29^{\circ}$
(D) $119.62^{\circ}$
(E) $71.59^{\circ}$
A2. We calculate the height of the trapezoid $v=d \cdot \sin \alpha \doteq 7.82 \mathrm{~cm}$. Then from $\sin \beta=\frac{v}{b}$ we get $\beta_{1} \doteq 60.38^{\circ}$ and $\beta_{2}=180^{\circ}-\beta_{1} \doteq 119.62^{\circ}$. The correct answer is $D$.