Jika a= 12cm ,b=17cm , t= 12cm, luas trapesium adalah

Luas = a + b x t/2
= 12 + 17 x 12/2
= 29 x 12/2
=348/2
=174

L. Trapesium = 1/2 x (a+b)x t
=1/2 x (12+17) x 12
=1/2 x 29 x 12
= 29 x 6
= 174