Answer:
13.5
Step-by-step explanation:
In order to solve this you need to first find out the area of the first triangle. You would do this by using the formula as stated:
A= 1/2 × base × height OR A= ab/2
the base is 9 and the height is 3, so if you plug in your variables you should get 13.5
Idk if this is right i'm sorry if its not.
