[填空题]
A toy house has a roof in the shape of a right-angled isf jn qy8dzrx8-h u*w/2w aae.0os*pz rp8.5l d.kjnx av e8k n(ione/c*)svx96wceles triangle, ABC.AB = 6esk/8kzlv dnjw*9ix* (8 orpae5n6c. p). vnx cm and angle $\textrm{A}\hat{\textrm{C}}\textrm{B}=90^{\circ}$.
1.Find the length of AC. cm
2.Calculate the area of triangle ABC. $cm^2$
The garage of the toy house also has a roof in the shape of right-angled triangle, LMN. , angle $\textrm{L}\hat{\textrm{M}}\textrm{N}=56^{\circ}$ and angle $\textrm{N}\hat{\textrm{L}}\textrm{M}=90^{\circ}$.
3.Calculate the length of MN. cm
