PLS HELP AND EXPLAIN ILL MARK U BRAINLIEST! PLSS

Answer:
89m²
Step-by-step explanation:
What I did first was solve for the big rectangle, 8x13=104
Then I solved for the area of the triangle, if it's 4, then a gap, then 4 and the entire length is 13, the gap=5. 6x5=30/2=15
You then subtract the two
104-15=89