Which equation can be used to calculate the area of the shaded triangle in the figure below?

A rectangle with a length of 18 feet and width of 4 feet. A diagonal cuts the rectangle into two halves. One of the triangular halves is shaded.
(1 point)


2(18 + 4) = 44

fraction 1 over 2 (18 + 4) = 11

2(18 × 4) = 144

fraction 1 over 2 (18 × 4) = 36

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