Answer:
302 m²
Explanation:
You want the area of the figure composed of a triangle and rectangle.
Area
The formulas for the areas of the parts are given in the problem statement.
Triangle
The base length of the triangle is (18 m - 5m - 5 m) = 8 m. Then its area is ...
A = 1/2bh
A = 1/2(8 m)(8 m) = 32 m²
Rectangle
The area of the rectangle is ...
A = LW
A = (18 m)(15 m) = 270 m²
Figure
The area of the figure is the sum of the areas of its parts:
A = (triangle area) + (rectangle area)
A = 32 m² +270 m² = 302 m²
The area of the figure is 302 m².
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