please help sama cara

L trapesium :
a=28 cm
b=10+28 = 38 cm
t= 28 cm
L= 1/2 (a+b) x t
   = 1/2( 28+38) x 28
    = 1/2 ( 66) 28
     = 33 x 28
      =924 cm²

Luas 1/2 Lingkaran = 1/2 xπxr² =1/2 x22/7 x 14² = 1/2x 22/7 x 196 =308 cm²

luas bangun = 924+308 =1232 cm²