Answer:
The answer to your question is Area = 144 u²
Step-by-step explanation:
Process
Area of a rectangle
A = base x heigth
Area of a rectangle
A = (base x height)/2
1.- Calculate the area of the rectangles
1st triangle to the left = 3 x 11 = 33 u²
2nd triangle = 4 x 11 = 44 u²
3rd triangle = 5 x 11 = 55 u²
2.- Calculate the area of the triangles
area = 2(3 x 4)/2 = 2(12)/2 = 12 = u²
3.- Add all the areas
Total area = 33 + 44 + 55 + 12 = 144 u²
