tolong dijawab buat besok yg saya bunderi

(6).luas lingkaran = pi x r x r = 3,14 x 35 x 35 = 3846,5 x 1/2 = A. 1925 (7). luas kubus = 14 x 28 = 392 cm , luas 1/4 lingkaran = pi x r x r = 3,14 x 14 x 14 = 615,44 x 1/4 = 154 cm = 392 + 154 = C. 546 (8).keliling trapesium = a + b + c + d = 28 + 40 + 32 + 32 = A.134