Answer:
The correct answer is option B. 54 ft^2
Explanation:
Formula:-
Area of triangle
Area A = bh/2
b - Base of triangle
h - Height of triangle
To find the area of triangle
Here base b = 9 ft and height h = 12 ft
Area, A = bh/2 = (9 * 12)/2 = 54 ft^2
Therefore the area of given triangle is 54 ft^2
The correct answer is option B. 54 ft^2