Answer:
54 units².
Step-by-step explanation:
To find out the area of a triangle we need to do,
18 x 6 = 108, (Base x height)
Now we have found out the area of a rectangle. Since a triangle is half a rectangle we are going to half our answer from the previous equation.
108 divided by 2 = 54. So that's your answer!
Hope that helps. x
