berserta caranya ,,tolong secepatnya soalnya besok di kumpul

panjang busur PQ = (45°/360°) x 2 x 22/7 x r
                     33     = 0,79 x r
                        r     = 33/0,79
                              = 42 cm

panjang busur QR = (<QOR /360°) x 2 π r
                        44  = (<QOR /360°) x 2 x 22/7 x 42
                        44  = 263 (<QOR/360°)
                 <QOR   = (44/263) x 360°
                               = 60°

b) r = 42 cm
c) Luas juring OQR = (60°/360°) x 22/7 x 42²
                                = 924 cm²