Answer:
18 inches
Explanation:
Area = (Base * Hight)/2
(12*3)/2 = 36/2
Area = 18 inches
Don't forget the units of measurement .
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
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