Answer:
66 inches squared. (D)
Explanation:
To get the base of the triangles, just divide the rectangle into 2 equal parts. Base of 1 triangle = 12÷2 = 6 inches
Area of triangle = ½ × base × height = ½ × 6 × 3 = 9 in²
Area of 2 triangles = 9 × 2 = 18 in²
Area of rectangle = length × width = 12 × 4 = 48 in²
Total area = 18 + 48 = 66 in²