求下列图形的周长。;o.A2d;D.}'v
(1) (2);o.A2d;D.}'v
算式:提示*_/F(Y7s-S5}*p1k;o.A2d;D.}'v
答:周长是/?+M/n/|/q:O2n分米。;o.A2d;D.}'v
算式:提示'b,[-y*i:I)b6R+L1|;o.A2d;D.}'v
答:周长是+O+@-u5e6?3[6s-O*v)i.g:O厘米。;o.A2d;D.}'v