求阴影部分的周长．/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
算式：提示1u/]7M9D3Z+e+{(V:r'x2d/@/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
答：阴影部分的周长是1y+S(t2N,u5t1P:^1Z分米。/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
算式：提示;p+K7|.a3j.t:C,W3g(?/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
答；阴影部分的周长是4~+|,f-n2A1s2b8z8?.n-Z厘米。/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
算式：提示7_.J1S-?;B:i/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@
答：阴影部分的周长是8B9]7q*Z/_;t9o*N/{厘米。/I;M.A/H/k(~.l3D.q+z2]0q3r6C/\5A,C(@