ka tolong bantuin aku yah

luas bangun = luas 1/2 lingkaran + luas segitiga sama kaki
diameter linfgkaran = 14
jari-jari lingkaran = 14:2 = 7

tinggi segitiga sama kaki = 4 dm
panjang alas segitiga = 14

luas 1/2 lingkaran = 1/2 x π x r²
                             = 1/2 x 22/7 x 7 x7
                            = 22/14 x 7 x7
                            = 11 x 7 = 77 cm²

luas segi tiga sama kaki = 1/2 x a x t
                                       = 1/2 x14 x 4
                                       =  7 x 4 = 28 cm²

luas yang diarsir = 77 + 28 = 105 cm²