nabillacihuyy
12) OP = 12cm , PQ = 9cm , jadi OQ = 21cm P.busur QR = 60°/360° x 2πr P.busur QR = 1/6 x 2 x 3,14 x 21 P.busur QR = 1/3 x 65,94 P.busur QR = 65,64/3 = 21,98cm
P.busur PS = 60°/360° x 2πr P.busur PS = 1/6 x 2 x 3,14 x 12 P.busur PS = 1/3 x 37,68 P.busur PS = 37,68/3 = 12,56cm
P.busur QR = 60°/360° x 2πr
P.busur QR = 1/6 x 2 x 3,14 x 21
P.busur QR = 1/3 x 65,94
P.busur QR = 65,64/3 = 21,98cm
P.busur PS = 60°/360° x 2πr
P.busur PS = 1/6 x 2 x 3,14 x 12
P.busur PS = 1/3 x 37,68
P.busur PS = 37,68/3 = 12,56cm
K.yg diarsir = 12,56 + 9 + 21,98 + 9 = 52,54cm