tolong pakai cara yang c aja

keliling 1/2 lingkaran = 1/2 ( 2 π r )
                                  = 1/2 (2 x 22/7 x 7)
                                  = 22 cm
keliling 1/4 lingkaran = 1/4 (2 π r)
                                  = 1/4 ( 2 x 22/7 x 7)
                                  = 11 cm

keliling daerah yang diarsir = 14 + 22 + 22 + 7 + 11 + (14 + 22 - 7)
                                            = 14 + 22 + 22 + 7 + 11 + 29
                                            =  105 cm