[填空题]
A motion sensing security light is iu 29dtdw-a k+:a zy rm2uj8tlwf:*yx(nstalled p339wgek: wymag anu//b-j :kin the corner of a front garden. The sensor can detect any movement up to 7 meters. The garden has boundaries of two 12 m long parallel walls, and the house facade and a wooden fence which are 66 m long. This creates :ewkgb wa /p:j ma39guny-/k3to a rectangular area as shown in the follow diagram, where the motion light is positioned in the top right corner.
1.Find the angle \alphaα in the diagram, leaving your answer in degrees. $^{\circ}$
2.Find the area of the front garden that is currently being monitored by the motion sensing system. $m^2$
