[填空题]
The quadrilateral ABCD has si47d dell* p(erh5kh3 lde le 7j..e96jrjy/pb napagz .r)i2;pya zngths AB =17 cm, BC = 12cm, and CD = 11cm. The siza2iy.zpen;/a.6 j r)pjyb. az9 jrpg 7e of angle $\mathrm{A}\hat{\mathrm{D}}\mathrm{C}$ is $105{\circ}$ and the size of angle $\mathrm{C}\hat{\mathrm{A}}\mathrm{D}$ is $25^{\circ}$.
1.Find the length of AC in centimetres. cm
2.Find the size of angle $\mathrm{A}\hat{\mathrm{B}}\mathrm{C}$. $^{\circ}$
