题目园丁住宅小区有一块草坪如图所示.已知AB=6mAB=6mAB=6m,BC=8mBC=8mBC=8m,CD=24mCD=24mCD=24m,DA=26mDA=26mDA=26m,且AB⊥BCAB\bot BCAB⊥BC,这块草坪的面积是( )A.48m248m^{2}48m2B.72m272m^{2}72m2C.121m2121m^{2}121m2D.144m2144m^{2}144m2知识点:勾股定理章节:图形的性质 / 三角形