Please help ASAP ! I’ll mark as brainlest if you explain

Answer:
49.5square units
Step-by-step explanation:
one over two times 11times9 you will get 99over two you divide then you get the answer
Answer:
using the formula 1/2 ×b×h
1/2 ×11×9 = 99/2 = 49.5 which is option (a)