[填空题]
A motion sensing security lig o:xbncmu1.d 9 vk1t:inlp4r o+iv00nht is instalw4scn;k/ft)f:rua8 x led in the corner of a front garden. The sensor can detect any movement up to 7 meters. Th;k: txaf4 w/f)nrcus8e 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 to 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. $m^2$
