Sisi=a 4cm, Sisi=b 12cm, tinggi= 5cm Berapa luas nya pake cara

Luas Trapesium
L = 1/2 x (a + b) x t
L = 1/2 x (4 + 12) x 5
L = 1/2 x 16 x 5
L = 8 x 5
L = 40 cm²

bangun datar trapesium

L = 1/2 ( a+b) x t
   = 1/2 (4+12 ) x 5
   = 1/2 ( 16 ) x 5
    = 8 x 5
    = 40 cm²

jadi luasnya = 40 cm²