PLEASE HELP FOR 20 POINTS

Answer:
Area = 108 square units.
Step-by-step explanation:
If you want to find the area of a triangle, the formula is 1/2 base times height. That would be 1/2 of 18 times 12. That is 9 times 12 which is equal to 108. (Don't forget the units) Please mark me brainliest! I hope this helps!