求图形的周长和面积。（单位：米）;{:g'K,z*B3}2d4K5h/z
;{:g'K,z*B3}2d4K5h/z
算式：提示'[9f'[5r8Y,z;{:g'K,z*B3}2d4K5h/z
答：阴影部分面积是-j2K,W*h平方米。;{:g'K,z*B3}2d4K5h/z