Respuesta :

Answer:

AREA =18

Step-by-step explanation

think of a rectangle, 12 by 3 which is also 12*3

so you do 12*3=36

but since it is a triangle you have to divide it by 2

36/2=18

18

Answer:

18 inches

Step-by-step explanation:

Area = (Base * Hight)/2

(12*3)/2 = 36/2

Area = 18 inches

Don't forget the units of measurement .