Answer:
391.5
Explanation:
Find the area of all the sides.
Triangles area: 9 X 10=90 because there are 2 so you don't need to divide by 2
Rectangles area: (9X10)X2= 180 because there is 2
Another rectangle area 13.5 X 9= 121.5
Add all: 90+180+121.5
Answer 391.5